56783993 has 8 divisors (see below), whose sum is σ = 66220800. Its totient is φ = 48671700.

The previous prime is 56783983. The next prime is 56784023. The reversal of 56783993 is 39938765.

It is not a de Polignac number, because 56783993 - 2⁴ = 56783977 is a prime.

It is a super-2 number, since 2×56783993² = 6448843722048098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56783983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82433 + ... + 83118.

It is an arithmetic number, because the mean of its divisors is an integer number (8277600).

Almost surely, 2^56783993 is an apocalyptic number.

It is an amenable number.

56783993 is a deficient number, since it is larger than the sum of its proper divisors (9436807).

56783993 is an equidigital number, since it uses as much as digits as its factorization.

56783993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165572 (or 165558 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 50.

The square root of 56783993 is about 7535.5154435513. The cubic root of 56783993 is about 384.3633555245.

The spelling of 56783993 in words is "fifty-six million, seven hundred eighty-three thousand, nine hundred ninety-three".