399951413 has 4 divisors (see below), whose sum is σ = 399994080. Its totient is φ = 399908748.

The previous prime is 399951407. The next prime is 399951427. The reversal of 399951413 is 314159993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 314159993 = 7 ⋅44879999.

It is a cyclic number.

It is not a de Polignac number, because 399951413 - 2¹⁰ = 399950389 is a prime.

It is a super-2 number, since 2×399951413² = 319922265521393138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399951403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 473 + ... + 28286.

It is an arithmetic number, because the mean of its divisors is an integer number (99998520).

Almost surely, 2^399951413 is an apocalyptic number.

It is an amenable number.

399951413 is a deficient number, since it is larger than the sum of its proper divisors (42667).

399951413 is a wasteful number, since it uses less digits than its factorization.

399951413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42666.

The product of its digits is 131220, while the sum is 44.

The square root of 399951413 is about 19998.7852881119. The cubic root of 399951413 is about 736.7764658470.

The spelling of 399951413 in words is "three hundred ninety-nine million, nine hundred fifty-one thousand, four hundred thirteen".