89821715 has 4 divisors (see below), whose sum is σ = 107786064. Its totient is φ = 71857368.

The previous prime is 89821691. The next prime is 89821763. The reversal of 89821715 is 51712898.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 89821715 - 2⁶ = 89821651 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8982167 + ... + 8982176.

It is an arithmetic number, because the mean of its divisors is an integer number (26946516).

Almost surely, 2^89821715 is an apocalyptic number.

89821715 is a deficient number, since it is larger than the sum of its proper divisors (17964349).

89821715 is a wasteful number, since it uses less digits than its factorization.

89821715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17964348.

The product of its digits is 40320, while the sum is 41.

The square root of 89821715 is about 9477.4318778876. The cubic root of 89821715 is about 447.8443652496.

The spelling of 89821715 in words is "eighty-nine million, eight hundred twenty-one thousand, seven hundred fifteen".