56697949 has 24 divisors (see below), whose sum is σ = 73921248. Its totient is φ = 42971040.

The previous prime is 56697943. The next prime is 56697959. The reversal of 56697949 is 94979665.

It is not a de Polignac number, because 56697949 - 2⁹ = 56697437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56697949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56697943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18522 + ... + 21364.

It is an arithmetic number, because the mean of its divisors is an integer number (3080052).

Almost surely, 2^56697949 is an apocalyptic number.

It is an amenable number.

56697949 is a deficient number, since it is larger than the sum of its proper divisors (17223299).

56697949 is a wasteful number, since it uses less digits than its factorization.

56697949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905 (or 2898 counting only the distinct ones).

The product of its digits is 3674160, while the sum is 55.

The square root of 56697949 is about 7529.8040479152. The cubic root of 56697949 is about 384.1691172219.

The spelling of 56697949 in words is "fifty-six million, six hundred ninety-seven thousand, nine hundred forty-nine".