56771289 has 6 divisors (see below), whose sum is σ = 82002986. Its totient is φ = 37847520.

The previous prime is 56771257. The next prime is 56771303. The reversal of 56771289 is 98217765.

56771289 is a `hidden beast` number, since 567 + 7 + 1 + 2 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29648025 + 27123264 = 5445^2 + 5208^2 .

It is not a de Polignac number, because 56771289 - 2⁵ = 56771257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56771219) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3153952 + ... + 3153969.

Almost surely, 2^56771289 is an apocalyptic number.

It is an amenable number.

56771289 is a deficient number, since it is larger than the sum of its proper divisors (25231697).

56771289 is a wasteful number, since it uses less digits than its factorization.

56771289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6307927 (or 6307924 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 56771289 is about 7534.6724547256. The cubic root of 56771289 is about 384.3346894867.

The spelling of 56771289 in words is "fifty-six million, seven hundred seventy-one thousand, two hundred eighty-nine".