55898989 has 8 divisors (see below), whose sum is σ = 56700000. Its totient is φ = 55103952.

The previous prime is 55898987. The next prime is 55899013. The reversal of 55898989 is 98989855.

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 55898989 - 2¹ = 55898987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55898987) 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, 19362 + ... + 22060.

It is an arithmetic number, because the mean of its divisors is an integer number (7087500).

Almost surely, 2^55898989 is an apocalyptic number.

It is an amenable number.

55898989 is a deficient number, since it is larger than the sum of its proper divisors (801011).

55898989 is a wasteful number, since it uses less digits than its factorization.

55898989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987.

The product of its digits is 9331200, while the sum is 61.

The square root of 55898989 is about 7476.5626460293. The cubic root of 55898989 is about 382.3560658554.

The spelling of 55898989 in words is "fifty-five million, eight hundred ninety-eight thousand, nine hundred eighty-nine".