77922057 has 8 divisors (see below), whose sum is σ = 103974784. Its totient is φ = 51908688.

The previous prime is 77922049. The next prime is 77922073. The reversal of 77922057 is 75022977.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77922057 - 2³ = 77922049 is a prime.

It is a super-2 number, since 2×77922057² = 12143693934222498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77922077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4858 + ... + 13395.

It is an arithmetic number, because the mean of its divisors is an integer number (12996848).

Almost surely, 2^77922057 is an apocalyptic number.

It is an amenable number.

77922057 is a deficient number, since it is larger than the sum of its proper divisors (26052727).

77922057 is a wasteful number, since it uses less digits than its factorization.

77922057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19679.

The product of its (nonzero) digits is 61740, while the sum is 39.

The square root of 77922057 is about 8827.3471099759. The cubic root of 77922057 is about 427.1235028604.

The spelling of 77922057 in words is "seventy-seven million, nine hundred twenty-two thousand, fifty-seven".