55395839 has 4 divisors (see below), whose sum is σ = 55818840. Its totient is φ = 54972840.

The previous prime is 55395817. The next prime is 55395841. The reversal of 55395839 is 93859355.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-55395839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55395793 and 55395802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55395859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211304 + ... + 211565.

It is an arithmetic number, because the mean of its divisors is an integer number (13954710).

Almost surely, 2^55395839 is an apocalyptic number.

55395839 is a deficient number, since it is larger than the sum of its proper divisors (423001).

55395839 is a wasteful number, since it uses less digits than its factorization.

55395839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423000.

The product of its digits is 729000, while the sum is 47.

The square root of 55395839 is about 7442.8381011547. The cubic root of 55395839 is about 381.2054035805.

The spelling of 55395839 in words is "fifty-five million, three hundred ninety-five thousand, eight hundred thirty-nine".