89921923 has 16 divisors (see below), whose sum is σ = 111174336. Its totient is φ = 70824960.

The previous prime is 89921921. The next prime is 89921933. The reversal of 89921923 is 32912998.

It is a cyclic number.

It is not a de Polignac number, because 89921923 - 2¹ = 89921921 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89921923.

It is not an unprimeable number, because it can be changed into a prime (89921921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19083 + ... + 23323.

It is an arithmetic number, because the mean of its divisors is an integer number (6948396).

Almost surely, 2^89921923 is an apocalyptic number.

89921923 is a deficient number, since it is larger than the sum of its proper divisors (21252413).

89921923 is a wasteful number, since it uses less digits than its factorization.

89921923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4494.

The product of its digits is 69984, while the sum is 43.

The square root of 89921923 is about 9482.7170684356. The cubic root of 89921923 is about 448.0108465566.

It can be divided in two parts, 899 and 21923, that added together give a palindrome (22822).

The spelling of 89921923 in words is "eighty-nine million, nine hundred twenty-one thousand, nine hundred twenty-three".