56876857 has 4 divisors (see below), whose sum is σ = 57023460. Its totient is φ = 56730256.

The previous prime is 56876843. The next prime is 56876873. The reversal of 56876857 is 75867865.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75867865 = 5 ⋅15173573.

It can be written as a sum of positive squares in 2 ways, for example, as 39992976 + 16883881 = 6324^2 + 4109^2 .

It is a cyclic number.

It is not a de Polignac number, because 56876857 - 2²³ = 48488249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56876257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72718 + ... + 73495.

It is an arithmetic number, because the mean of its divisors is an integer number (14255865).

Almost surely, 2^56876857 is an apocalyptic number.

It is an amenable number.

56876857 is a deficient number, since it is larger than the sum of its proper divisors (146603).

56876857 is a wasteful number, since it uses less digits than its factorization.

56876857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146602.

The product of its digits is 2822400, while the sum is 52.

The square root of 56876857 is about 7541.6746813954. The cubic root of 56876857 is about 384.5727694620.

It can be divided in two parts, 5687 and 6857, that added together give a square (12544 = 112²).

The spelling of 56876857 in words is "fifty-six million, eight hundred seventy-six thousand, eight hundred fifty-seven".