89987855 has 4 divisors (see below), whose sum is σ = 107985432. Its totient is φ = 71990280.

The previous prime is 89987839. The next prime is 89987861. The reversal of 89987855 is 55878998.

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

It is not a de Polignac number, because 89987855 - 2⁴ = 89987839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 89987794 and 89987803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8998781 + ... + 8998790.

It is an arithmetic number, because the mean of its divisors is an integer number (26996358).

Almost surely, 2^89987855 is an apocalyptic number.

89987855 is a deficient number, since it is larger than the sum of its proper divisors (17997577).

89987855 is a wasteful number, since it uses less digits than its factorization.

89987855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17997576.

The product of its digits is 7257600, while the sum is 59.

The square root of 89987855 is about 9486.1928612062. The cubic root of 89987855 is about 448.1203157264.

The spelling of 89987855 in words is "eighty-nine million, nine hundred eighty-seven thousand, eight hundred fifty-five".