56687039 has 4 divisors (see below), whose sum is σ = 57485520. Its totient is φ = 55888560.

The previous prime is 56687021. The next prime is 56687047. The reversal of 56687039 is 93078665.

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 56687039 - 2⁸ = 56686783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56687009) 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, 399134 + ... + 399275.

It is an arithmetic number, because the mean of its divisors is an integer number (14371380).

Almost surely, 2^56687039 is an apocalyptic number.

56687039 is a deficient number, since it is larger than the sum of its proper divisors (798481).

56687039 is an equidigital number, since it uses as much as digits as its factorization.

56687039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798480.

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 56687039 is about 7529.0795586180. The cubic root of 56687039 is about 384.1444746261.

The spelling of 56687039 in words is "fifty-six million, six hundred eighty-seven thousand, thirty-nine".