55989619 has 8 divisors (see below), whose sum is σ = 67752288. Its totient is φ = 45168000.

The previous prime is 55989611. The next prime is 55989623. The reversal of 55989619 is 91698955.

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

It is a cyclic number.

It is not a de Polignac number, because 55989619 - 2³ = 55989611 is a prime.

It is a super-2 number, since 2×55989619² = 6269674871530322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55989611) 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, 235132 + ... + 235369.

It is an arithmetic number, because the mean of its divisors is an integer number (8469036).

Almost surely, 2^55989619 is an apocalyptic number.

55989619 is a deficient number, since it is larger than the sum of its proper divisors (11762669).

55989619 is a wasteful number, since it uses less digits than its factorization.

55989619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470525.

The product of its digits is 874800, while the sum is 52.

The square root of 55989619 is about 7482.6211316624. The cubic root of 55989619 is about 382.5625944523.

The spelling of 55989619 in words is "fifty-five million, nine hundred eighty-nine thousand, six hundred nineteen".