77604223 has 4 divisors (see below), whose sum is σ = 77952448. Its totient is φ = 77256000.

The previous prime is 77604209. The next prime is 77604257. The reversal of 77604223 is 32240677.

It is a happy number.

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 77604223 - 2⁹ = 77603711 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 (77604283) 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, 173778 + ... + 174223.

It is an arithmetic number, because the mean of its divisors is an integer number (19488112).

Almost surely, 2^77604223 is an apocalyptic number.

77604223 is a deficient number, since it is larger than the sum of its proper divisors (348225).

77604223 is a wasteful number, since it uses less digits than its factorization.

77604223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348224.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 77604223 is about 8809.3259106472. The cubic root of 77604223 is about 426.5419843067.

The spelling of 77604223 in words is "seventy-seven million, six hundred four thousand, two hundred twenty-three".