89942521 has 2 divisors, whose sum is σ = 89942522. Its totient is φ = 89942520.

The previous prime is 89942513. The next prime is 89942533. The reversal of 89942521 is 12524998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53509225 + 36433296 = 7315^2 + 6036^2 .

It is a cyclic number.

It is not a de Polignac number, because 89942521 - 2³ = 89942513 is a prime.

It is not a weakly prime, because it can be changed into another prime (89942921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44971260 + 44971261.

It is an arithmetic number, because the mean of its divisors is an integer number (44971261).

Almost surely, 2^89942521 is an apocalyptic number.

It is an amenable number.

89942521 is a deficient number, since it is larger than the sum of its proper divisors (1).

89942521 is an equidigital number, since it uses as much as digits as its factorization.

89942521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 89942521 is about 9483.8030873695. The cubic root of 89942521 is about 448.0450518708.

The spelling of 89942521 in words is "eighty-nine million, nine hundred forty-two thousand, five hundred twenty-one".