89726521 has 4 divisors (see below), whose sum is σ = 89747344. Its totient is φ = 89705700.

The previous prime is 89726489. The next prime is 89726543. The reversal of 89726521 is 12562798.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 89726521 - 2⁵ = 89726489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89726621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275 + ... + 13456.

It is an arithmetic number, because the mean of its divisors is an integer number (22436836).

Almost surely, 2^89726521 is an apocalyptic number.

It is an amenable number.

89726521 is a deficient number, since it is larger than the sum of its proper divisors (20823).

89726521 is a wasteful number, since it uses less digits than its factorization.

89726521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20822.

The product of its digits is 60480, while the sum is 40.

The square root of 89726521 is about 9472.4084054690. The cubic root of 89726521 is about 447.6860992667.

The spelling of 89726521 in words is "eighty-nine million, seven hundred twenty-six thousand, five hundred twenty-one".