89015921 has 2 divisors, whose sum is σ = 89015922. Its totient is φ = 89015920.

The previous prime is 89015909. The next prime is 89015929. The reversal of 89015921 is 12951098.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79405921 + 9610000 = 8911^2 + 3100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89015921 is a prime.

It is not a weakly prime, because it can be changed into another prime (89015929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44507960 + 44507961.

It is an arithmetic number, because the mean of its divisors is an integer number (44507961).

Almost surely, 2^89015921 is an apocalyptic number.

It is an amenable number.

89015921 is a deficient number, since it is larger than the sum of its proper divisors (1).

89015921 is an equidigital number, since it uses as much as digits as its factorization.

89015921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 89015921 is about 9434.8249056355. The cubic root of 89015921 is about 446.5011308950.

The spelling of 89015921 in words is "eighty-nine million, fifteen thousand, nine hundred twenty-one".