406958512489 has 3 divisors (see below), whose sum is σ = 406959150423. Its totient is φ = 406957874556.

The previous prime is 406958512427. The next prime is 406958512517. The reversal of 406958512489 is 984215859604.

The square root of 406958512489 is 637933.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1561435225 + 405397077264 = 39515^2 + 636708^2 .

It is not a de Polignac number, because 406958512489 - 2⁷ = 406958512361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406958512409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 318967 + ... + 956899.

It is an arithmetic number, because the mean of its divisors is an integer number (135653050141).

Almost surely, 2^406958512489 is an apocalyptic number.

406958512489 is the 637933-rd square number.

406958512489 is the 318967-th centered octagonal number.

It is an amenable number.

406958512489 is a deficient number, since it is larger than the sum of its proper divisors (637934).

406958512489 is an frugal number, since it uses more digits than its factorization.

406958512489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275866 (or 637933 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 61.

The spelling of 406958512489 in words is "four hundred six billion, nine hundred fifty-eight million, five hundred twelve thousand, four hundred eighty-nine".