55639883 has 4 divisors (see below), whose sum is σ = 59919888. Its totient is φ = 51359880.

The previous prime is 55639873. The next prime is 55639889. The reversal of 55639883 is 38893655.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38893655 = 5 ⋅7778731.

It is not a de Polignac number, because 55639883 - 2²⁰ = 54591307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55639889) 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, 2139983 + ... + 2140008.

It is an arithmetic number, because the mean of its divisors is an integer number (14979972).

Almost surely, 2^55639883 is an apocalyptic number.

55639883 is a deficient number, since it is larger than the sum of its proper divisors (4280005).

55639883 is a wasteful number, since it uses less digits than its factorization.

55639883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4280004.

The product of its digits is 777600, while the sum is 47.

The square root of 55639883 is about 7459.2146369440. The cubic root of 55639883 is about 381.7643782377.

The spelling of 55639883 in words is "fifty-five million, six hundred thirty-nine thousand, eight hundred eighty-three".