89700021 has 16 divisors (see below), whose sum is σ = 135981120. Its totient is φ = 58408560.

The previous prime is 89699999. The next prime is 89700059. The reversal of 89700021 is 12000798.

It is not a de Polignac number, because 89700021 - 2⁵ = 89699989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89700421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37470 + ... + 39791.

It is an arithmetic number, because the mean of its divisors is an integer number (8498820).

Almost surely, 2^89700021 is an apocalyptic number.

It is an amenable number.

89700021 is a deficient number, since it is larger than the sum of its proper divisors (46281099).

89700021 is a wasteful number, since it uses less digits than its factorization.

89700021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77313 (or 77307 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 89700021 is about 9471.0095026877. The cubic root of 89700021 is about 447.6420214413.

The spelling of 89700021 in words is "eighty-nine million, seven hundred thousand, twenty-one".