56940691 has 4 divisors (see below), whose sum is σ = 57040984. Its totient is φ = 56840400.

The previous prime is 56940673. The next prime is 56940721. The reversal of 56940691 is 19604965.

56940691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56940691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56940991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49290 + ... + 50431.

It is an arithmetic number, because the mean of its divisors is an integer number (14260246).

Almost surely, 2^56940691 is an apocalyptic number.

56940691 is a deficient number, since it is larger than the sum of its proper divisors (100293).

56940691 is an equidigital number, since it uses as much as digits as its factorization.

56940691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100292.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 56940691 is about 7545.9055785240. The cubic root of 56940691 is about 384.7165868323.

The spelling of 56940691 in words is "fifty-six million, nine hundred forty thousand, six hundred ninety-one".