77264009 has 4 divisors (see below), whose sum is σ = 77298816. Its totient is φ = 77229204.

The previous prime is 77263999. The next prime is 77264021. The reversal of 77264009 is 90046277.

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 an emirpimes, since its reverse is a distinct semiprime: 90046277 = 1483 ⋅60719.

It is a cyclic number.

It is not a de Polignac number, because 77264009 - 2⁴ = 77263993 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 77264009.

It is not an unprimeable number, because it can be changed into a prime (77266009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13829 + ... + 18594.

It is an arithmetic number, because the mean of its divisors is an integer number (19324704).

Almost surely, 2^77264009 is an apocalyptic number.

It is an amenable number.

77264009 is a deficient number, since it is larger than the sum of its proper divisors (34807).

77264009 is a wasteful number, since it uses less digits than its factorization.

77264009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34806.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 77264009 is about 8789.9948236617. The cubic root of 77264009 is about 425.9177565375.

The spelling of 77264009 in words is "seventy-seven million, two hundred sixty-four thousand, nine".