56999903 has 4 divisors (see below), whose sum is σ = 57017928. Its totient is φ = 56981880.

The previous prime is 56999893. The next prime is 56999923. The reversal of 56999903 is 30999965.

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 56999903 - 2²⁴ = 40222687 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 (56999923) 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, 2876 + ... + 11057.

It is an arithmetic number, because the mean of its divisors is an integer number (14254482).

Almost surely, 2^56999903 is an apocalyptic number.

56999903 is a deficient number, since it is larger than the sum of its proper divisors (18025).

56999903 is a wasteful number, since it uses less digits than its factorization.

56999903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18024.

The product of its (nonzero) digits is 590490, while the sum is 50.

The square root of 56999903 is about 7549.8280112861. The cubic root of 56999903 is about 384.8498948208.

The spelling of 56999903 in words is "fifty-six million, nine hundred ninety-nine thousand, nine hundred three".