77604407 has 4 divisors (see below), whose sum is σ = 77998536. Its totient is φ = 77210280.

The previous prime is 77604391. The next prime is 77604413. The reversal of 77604407 is 70440677.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77604407 - 2⁴ = 77604391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77604427) 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 3 ways as a sum of consecutive naturals, for example, 196769 + ... + 197162.

It is an arithmetic number, because the mean of its divisors is an integer number (19499634).

Almost surely, 2^77604407 is an apocalyptic number.

77604407 is a deficient number, since it is larger than the sum of its proper divisors (394129).

77604407 is a wasteful number, since it uses less digits than its factorization.

77604407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394128.

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 77604407 is about 8809.3363541189. The cubic root of 77604407 is about 426.5423214175.

It can be divided in two parts, 7760 and 4407, that added together give a cube (12167 = 23³).

The spelling of 77604407 in words is "seventy-seven million, six hundred four thousand, four hundred seven".