55189959 has 8 divisors (see below), whose sum is σ = 80276352. Its totient is φ = 33448440.

The previous prime is 55189931. The next prime is 55189961. The reversal of 55189959 is 95998155.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55189959 - 2¹² = 55185863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55189909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 836179 + ... + 836244.

It is an arithmetic number, because the mean of its divisors is an integer number (10034544).

Almost surely, 2^55189959 is an apocalyptic number.

55189959 is a deficient number, since it is larger than the sum of its proper divisors (25086393).

55189959 is a wasteful number, since it uses less digits than its factorization.

55189959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672437.

The product of its digits is 729000, while the sum is 51.

The square root of 55189959 is about 7428.9944810856. The cubic root of 55189959 is about 380.7325642324.

The spelling of 55189959 in words is "fifty-five million, one hundred eighty-nine thousand, nine hundred fifty-nine".