56861867 has 4 divisors (see below), whose sum is σ = 58184280. Its totient is φ = 55539456.

The previous prime is 56861863. The next prime is 56861873. The reversal of 56861867 is 76816865.

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 56861867 - 2² = 56861863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56861863) 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, 661142 + ... + 661227.

It is an arithmetic number, because the mean of its divisors is an integer number (14546070).

Almost surely, 2^56861867 is an apocalyptic number.

56861867 is a deficient number, since it is larger than the sum of its proper divisors (1322413).

56861867 is a wasteful number, since it uses less digits than its factorization.

56861867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322412.

The product of its digits is 483840, while the sum is 47.

The square root of 56861867 is about 7540.6808048080. The cubic root of 56861867 is about 384.5389815406.

The spelling of 56861867 in words is "fifty-six million, eight hundred sixty-one thousand, eight hundred sixty-seven".