56400943 has 4 divisors (see below), whose sum is σ = 56421640. Its totient is φ = 56380248.

The previous prime is 56400919. The next prime is 56400947. The reversal of 56400943 is 34900465.

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-56400943 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 (56400947) 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, 5505 + ... + 11962.

It is an arithmetic number, because the mean of its divisors is an integer number (14105410).

Almost surely, 2^56400943 is an apocalyptic number.

56400943 is a deficient number, since it is larger than the sum of its proper divisors (20697).

56400943 is a wasteful number, since it uses less digits than its factorization.

56400943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20696.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 56400943 is about 7510.0561249567. The cubic root of 56400943 is about 383.4971331903.

The spelling of 56400943 in words is "fifty-six million, four hundred thousand, nine hundred forty-three".