55839899 has 4 divisors (see below), whose sum is σ = 56893536. Its totient is φ = 54786264.

The previous prime is 55839887. The next prime is 55839911. The reversal of 55839899 is 99893855.

55839899 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99893855 = 5 ⋅19978771.

It is an interprime number because it is at equal distance from previous prime (55839887) and next prime (55839911).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55839899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55839829) 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, 526739 + ... + 526844.

It is an arithmetic number, because the mean of its divisors is an integer number (14223384).

Almost surely, 2^55839899 is an apocalyptic number.

55839899 is a deficient number, since it is larger than the sum of its proper divisors (1053637).

55839899 is a wasteful number, since it uses less digits than its factorization.

55839899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053636.

The product of its digits is 3499200, while the sum is 56.

The square root of 55839899 is about 7472.6099188971. The cubic root of 55839899 is about 382.2212906948.

The spelling of 55839899 in words is "fifty-five million, eight hundred thirty-nine thousand, eight hundred ninety-nine".