56399783 has 8 divisors (see below), whose sum is σ = 61727376. Its totient is φ = 51105600.

The previous prime is 56399779. The next prime is 56399801. The reversal of 56399783 is 38799365.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56399783 - 2² = 56399779 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 (56399743) 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, 4748 + ... + 11633.

It is an arithmetic number, because the mean of its divisors is an integer number (7715922).

Almost surely, 2^56399783 is an apocalyptic number.

56399783 is a deficient number, since it is larger than the sum of its proper divisors (5327593).

56399783 is a wasteful number, since it uses less digits than its factorization.

56399783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16705.

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

The square root of 56399783 is about 7509.9788947773. The cubic root of 56399783 is about 383.4945040397.

The spelling of 56399783 in words is "fifty-six million, three hundred ninety-nine thousand, seven hundred eighty-three".