77272513 has 4 divisors (see below), whose sum is σ = 77338800. Its totient is φ = 77206228.

The previous prime is 77272499. The next prime is 77272519. The reversal of 77272513 is 31527277.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 77272513 - 2⁹ = 77272001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77272519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31363 + ... + 33736.

It is an arithmetic number, because the mean of its divisors is an integer number (19334700).

Almost surely, 2^77272513 is an apocalyptic number.

It is an amenable number.

77272513 is a deficient number, since it is larger than the sum of its proper divisors (66287).

77272513 is a wasteful number, since it uses less digits than its factorization.

77272513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66286.

The product of its digits is 20580, while the sum is 34.

The square root of 77272513 is about 8790.4785421500. The cubic root of 77272513 is about 425.9333820608.

The spelling of 77272513 in words is "seventy-seven million, two hundred seventy-two thousand, five hundred thirteen".