77477057 has 4 divisors (see below), whose sum is σ = 88545216. Its totient is φ = 66408900.

The previous prime is 77477053. The next prime is 77477063. The reversal of 77477057 is 75077477.

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: 75077477 = 37 ⋅2029121.

It is a cyclic number.

It is not a de Polignac number, because 77477057 - 2² = 77477053 is a prime.

It is a super-2 number, since 2×77477057² = 12005388722762498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77476999 and 77477017.

It is not an unprimeable number, because it can be changed into a prime (77477053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5534069 + ... + 5534082.

It is an arithmetic number, because the mean of its divisors is an integer number (22136304).

Almost surely, 2^77477057 is an apocalyptic number.

It is an amenable number.

77477057 is a deficient number, since it is larger than the sum of its proper divisors (11068159).

77477057 is a wasteful number, since it uses less digits than its factorization.

77477057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11068158.

The product of its (nonzero) digits is 336140, while the sum is 44.

The square root of 77477057 is about 8802.1052595388. The cubic root of 77477057 is about 426.3088728835.

The spelling of 77477057 in words is "seventy-seven million, four hundred seventy-seven thousand, fifty-seven".