89702581 has 2 divisors, whose sum is σ = 89702582. Its totient is φ = 89702580.

The previous prime is 89702579. The next prime is 89702603. The reversal of 89702581 is 18520798.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66748900 + 22953681 = 8170^2 + 4791^2 .

It is a cyclic number.

It is not a de Polignac number, because 89702581 - 2¹ = 89702579 is a prime.

It is a super-2 number, since 2×89702581² = 16093106076123122, which contains 22 as substring.

Together with 89702579, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89702551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44851290 + 44851291.

It is an arithmetic number, because the mean of its divisors is an integer number (44851291).

Almost surely, 2^89702581 is an apocalyptic number.

It is an amenable number.

89702581 is a deficient number, since it is larger than the sum of its proper divisors (1).

89702581 is an equidigital number, since it uses as much as digits as its factorization.

89702581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 89702581 is about 9471.1446509912. The cubic root of 89702581 is about 447.6462799044.

The spelling of 89702581 in words is "eighty-nine million, seven hundred two thousand, five hundred eighty-one".