89724251 has 8 divisors (see below), whose sum is σ = 94537680. Its totient is φ = 84919968.

The previous prime is 89724221. The next prime is 89724253. The reversal of 89724251 is 15242798.

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

It is not a de Polignac number, because 89724251 - 2²² = 85529947 is a prime.

It is a super-2 number, since 2×89724251² = 16100882435022002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89724253) 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, 28865 + ... + 31821.

It is an arithmetic number, because the mean of its divisors is an integer number (11817210).

Almost surely, 2^89724251 is an apocalyptic number.

89724251 is a deficient number, since it is larger than the sum of its proper divisors (4813429).

89724251 is a wasteful number, since it uses less digits than its factorization.

89724251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4573.

The product of its digits is 40320, while the sum is 38.

The square root of 89724251 is about 9472.2885830194. The cubic root of 89724251 is about 447.6823238835.

The spelling of 89724251 in words is "eighty-nine million, seven hundred twenty-four thousand, two hundred fifty-one".