99089521 has 2 divisors, whose sum is σ = 99089522. Its totient is φ = 99089520.

The previous prime is 99089519. The next prime is 99089533. The reversal of 99089521 is 12598099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98010000 + 1079521 = 9900^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 99089521 - 2¹ = 99089519 is a prime.

Together with 99089519, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (99089021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49544760 + 49544761.

It is an arithmetic number, because the mean of its divisors is an integer number (49544761).

Almost surely, 2^99089521 is an apocalyptic number.

It is an amenable number.

99089521 is a deficient number, since it is larger than the sum of its proper divisors (1).

99089521 is an equidigital number, since it uses as much as digits as its factorization.

99089521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 99089521 is about 9954.3719540712. The cubic root of 99089521 is about 462.7458966093.

The spelling of 99089521 in words is "ninety-nine million, eighty-nine thousand, five hundred twenty-one".