89981901 has 16 divisors (see below), whose sum is σ = 141148800. Its totient is φ = 56458944.

The previous prime is 89981897. The next prime is 89981909. The reversal of 89981901 is 10918998.

It is not a de Polignac number, because 89981901 - 2² = 89981897 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89981909) 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, 97561 + ... + 98478.

It is an arithmetic number, because the mean of its divisors is an integer number (8821800).

Almost surely, 2^89981901 is an apocalyptic number.

It is an amenable number.

89981901 is a deficient number, since it is larger than the sum of its proper divisors (51166899).

89981901 is a wasteful number, since it uses less digits than its factorization.

89981901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196065 (or 196059 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 45.

The square root of 89981901 is about 9485.8790314867. The cubic root of 89981901 is about 448.1104322920.

The spelling of 89981901 in words is "eighty-nine million, nine hundred eighty-one thousand, nine hundred one".