56105999 has 4 divisors (see below), whose sum is σ = 57474480. Its totient is φ = 54737520.

The previous prime is 56105977. The next prime is 56106007. The reversal of 56105999 is 99950165.

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-56105999 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 (56104999) 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, 684179 + ... + 684260.

It is an arithmetic number, because the mean of its divisors is an integer number (14368620).

Almost surely, 2^56105999 is an apocalyptic number.

56105999 is a deficient number, since it is larger than the sum of its proper divisors (1368481).

56105999 is a wasteful number, since it uses less digits than its factorization.

56105999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368480.

The product of its (nonzero) digits is 109350, while the sum is 44.

The square root of 56105999 is about 7490.3937813709. The cubic root of 56105999 is about 382.8274758290.

The spelling of 56105999 in words is "fifty-six million, one hundred five thousand, nine hundred ninety-nine".