77604399 has 20 divisors (see below), whose sum is σ = 116642064. Its totient is φ = 51417504.

The previous prime is 77604391. The next prime is 77604413. The reversal of 77604399 is 99340677.

77604399 is a `hidden beast` number, since 7 + 7 + 604 + 39 + 9 = 666.

It is not a de Polignac number, because 77604399 - 2³ = 77604391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77604391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10659 + ... + 16395.

Almost surely, 2^77604399 is an apocalyptic number.

77604399 is a deficient number, since it is larger than the sum of its proper divisors (39037665).

77604399 is a wasteful number, since it uses less digits than its factorization.

77604399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5916 (or 5907 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 45.

The square root of 77604399 is about 8809.3359000551. The cubic root of 77604399 is about 426.5423067605.

The spelling of 77604399 in words is "seventy-seven million, six hundred four thousand, three hundred ninety-nine".