56839819 has 4 divisors (see below), whose sum is σ = 57128544. Its totient is φ = 56551096.

The previous prime is 56839787. The next prime is 56839841. The reversal of 56839819 is 91893865.

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 56839819 - 2⁵ = 56839787 is a prime.

It is a super-2 number, since 2×56839819² = 6461530047905522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56839889) 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, 144067 + ... + 144460.

It is an arithmetic number, because the mean of its divisors is an integer number (14282136).

Almost surely, 2^56839819 is an apocalyptic number.

56839819 is a deficient number, since it is larger than the sum of its proper divisors (288725).

56839819 is a wasteful number, since it uses less digits than its factorization.

56839819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288724.

The product of its digits is 466560, while the sum is 49.

The square root of 56839819 is about 7539.2187261015. The cubic root of 56839819 is about 384.4892738779.

The spelling of 56839819 in words is "fifty-six million, eight hundred thirty-nine thousand, eight hundred nineteen".