56978699 has 4 divisors (see below), whose sum is σ = 57200664. Its totient is φ = 56756736.

The previous prime is 56978641. The next prime is 56978729. The reversal of 56978699 is 99687965.

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 56978699 - 2¹⁶ = 56913163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56978629) 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, 110597 + ... + 111110.

It is an arithmetic number, because the mean of its divisors is an integer number (14300166).

Almost surely, 2^56978699 is an apocalyptic number.

56978699 is a deficient number, since it is larger than the sum of its proper divisors (221965).

56978699 is a wasteful number, since it uses less digits than its factorization.

56978699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221964.

The product of its digits is 7348320, while the sum is 59.

The square root of 56978699 is about 7548.4236102646. The cubic root of 56978699 is about 384.8021674339.

The spelling of 56978699 in words is "fifty-six million, nine hundred seventy-eight thousand, six hundred ninety-nine".