89900521 has 2 divisors, whose sum is σ = 89900522. Its totient is φ = 89900520.

The previous prime is 89900513. The next prime is 89900549. The reversal of 89900521 is 12500998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69973225 + 19927296 = 8365^2 + 4464^2 .

It is a cyclic number.

It is not a de Polignac number, because 89900521 - 2³ = 89900513 is a prime.

It is a super-3 number, since 3×89900521³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (89900581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44950260 + 44950261.

It is an arithmetic number, because the mean of its divisors is an integer number (44950261).

Almost surely, 2^89900521 is an apocalyptic number.

It is an amenable number.

89900521 is a deficient number, since it is larger than the sum of its proper divisors (1).

89900521 is an equidigital number, since it uses as much as digits as its factorization.

89900521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 89900521 is about 9481.5885272458. The cubic root of 89900521 is about 447.9753005755.

The spelling of 89900521 in words is "eighty-nine million, nine hundred thousand, five hundred twenty-one".