89513921 has 12 divisors (see below), whose sum is σ = 107972352. Its totient is φ = 72685944.

The previous prime is 89513899. The next prime is 89513927. The reversal of 89513921 is 12931598.

It is a de Polignac number, because none of the positive numbers 2^k-89513921 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89513927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15185 + ... + 20238.

It is an arithmetic number, because the mean of its divisors is an integer number (8997696).

Almost surely, 2^89513921 is an apocalyptic number.

It is an amenable number.

89513921 is a deficient number, since it is larger than the sum of its proper divisors (18458431).

89513921 is a wasteful number, since it uses less digits than its factorization.

89513921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35468 (or 35449 counting only the distinct ones).

The product of its digits is 19440, while the sum is 38.

The square root of 89513921 is about 9461.1796833165. The cubic root of 89513921 is about 447.3322338577.

The spelling of 89513921 in words is "eighty-nine million, five hundred thirteen thousand, nine hundred twenty-one".