55437839 has 4 divisors (see below), whose sum is σ = 58355640. Its totient is φ = 52520040.

The previous prime is 55437829. The next prime is 55437847. The reversal of 55437839 is 93873455.

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 55437839 - 2²⁰ = 54389263 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55437839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55437829) 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, 1458872 + ... + 1458909.

It is an arithmetic number, because the mean of its divisors is an integer number (14588910).

Almost surely, 2^55437839 is an apocalyptic number.

55437839 is a deficient number, since it is larger than the sum of its proper divisors (2917801).

55437839 is a wasteful number, since it uses less digits than its factorization.

55437839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2917800.

The product of its digits is 453600, while the sum is 44.

The square root of 55437839 is about 7445.6590708949. The cubic root of 55437839 is about 381.3017199744.

The spelling of 55437839 in words is "fifty-five million, four hundred thirty-seven thousand, eight hundred thirty-nine".