89855639 has 4 divisors (see below), whose sum is σ = 92754240. Its totient is φ = 86957040.

The previous prime is 89855621. The next prime is 89855657. The reversal of 89855639 is 93655898.

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

It is an interprime number because it is at equal distance from previous prime (89855621) and next prime (89855657).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89855639 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 (89855609) 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, 1449254 + ... + 1449315.

It is an arithmetic number, because the mean of its divisors is an integer number (23188560).

Almost surely, 2^89855639 is an apocalyptic number.

89855639 is a deficient number, since it is larger than the sum of its proper divisors (2898601).

89855639 is a wasteful number, since it uses less digits than its factorization.

89855639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898600.

The product of its digits is 2332800, while the sum is 53.

The square root of 89855639 is about 9479.2214342740. The cubic root of 89855639 is about 447.9007389969.

The spelling of 89855639 in words is "eighty-nine million, eight hundred fifty-five thousand, six hundred thirty-nine".