56209799 has 4 divisors (see below), whose sum is σ = 56229264. Its totient is φ = 56190336.

The previous prime is 56209787. The next prime is 56209807. The reversal of 56209799 is 99790265.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99790265 = 5 ⋅19958053.

It is a cyclic number.

It is not a de Polignac number, because 56209799 - 2¹² = 56205703 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 (56209399) 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, 4442 + ... + 11495.

It is an arithmetic number, because the mean of its divisors is an integer number (14057316).

Almost surely, 2^56209799 is an apocalyptic number.

56209799 is a deficient number, since it is larger than the sum of its proper divisors (19465).

56209799 is a wasteful number, since it uses less digits than its factorization.

56209799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19464.

The product of its (nonzero) digits is 306180, while the sum is 47.

The square root of 56209799 is about 7497.3194543117. The cubic root of 56209799 is about 383.0634162046.

The spelling of 56209799 in words is "fifty-six million, two hundred nine thousand, seven hundred ninety-nine".