89955999 has 48 divisors (see below), whose sum is σ = 156686400. Its totient is φ = 48642048.

The previous prime is 89955973. The next prime is 89956001. The reversal of 89955999 is 99955998.

It is not a de Polignac number, because 89955999 - 2⁸ = 89955743 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89905999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96367 + ... + 97295.

It is an arithmetic number, because the mean of its divisors is an integer number (3264300).

Almost surely, 2^89955999 is an apocalyptic number.

89955999 is a deficient number, since it is larger than the sum of its proper divisors (66730401).

89955999 is a wasteful number, since it uses less digits than its factorization.

89955999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024 (or 1021 counting only the distinct ones).

The product of its digits is 11809800, while the sum is 63.

The square root of 89955999 is about 9484.5136406671. The cubic root of 89955999 is about 448.0674307914.

Subtracting 89955999 from its reverse (99955998), we obtain a palindrome (9999999).

The spelling of 89955999 in words is "eighty-nine million, nine hundred fifty-five thousand, nine hundred ninety-nine".