56687867 has 4 divisors (see below), whose sum is σ = 57272376. Its totient is φ = 56103360.

The previous prime is 56687863. The next prime is 56687879. The reversal of 56687867 is 76878665.

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 56687867 - 2² = 56687863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56687863) 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, 292109 + ... + 292302.

It is an arithmetic number, because the mean of its divisors is an integer number (14318094).

Almost surely, 2^56687867 is an apocalyptic number.

56687867 is a deficient number, since it is larger than the sum of its proper divisors (584509).

56687867 is an equidigital number, since it uses as much as digits as its factorization.

56687867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584508.

The product of its digits is 3386880, while the sum is 53.

The square root of 56687867 is about 7529.1345452183. The cubic root of 56687867 is about 384.1463449541.

The spelling of 56687867 in words is "fifty-six million, six hundred eighty-seven thousand, eight hundred sixty-seven".