98657521 has 8 divisors (see below), whose sum is σ = 101198664. Its totient is φ = 96122880.

The previous prime is 98657483. The next prime is 98657549. The reversal of 98657521 is 12575689.

It can be written as a sum of positive squares in 4 ways, for example, as 9090225 + 89567296 = 3015^2 + 9464^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 98657521 - 2⁷ = 98657393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98657591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47905 + ... + 49921.

It is an arithmetic number, because the mean of its divisors is an integer number (12649833).

Almost surely, 2^98657521 is an apocalyptic number.

It is an amenable number.

98657521 is a deficient number, since it is larger than the sum of its proper divisors (2541143).

98657521 is a wasteful number, since it uses less digits than its factorization.

98657521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251.

The product of its digits is 151200, while the sum is 43.

The square root of 98657521 is about 9932.6492437818. The cubic root of 98657521 is about 462.0724401193.

The spelling of 98657521 in words is "ninety-eight million, six hundred fifty-seven thousand, five hundred twenty-one".