89722821 has 8 divisors (see below), whose sum is σ = 126667584. Its totient is φ = 56296640.

The previous prime is 89722813. The next prime is 89722837. The reversal of 89722821 is 12822798.

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 89722821 - 2³ = 89722813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89722821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89722121) 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, 879585 + ... + 879686.

It is an arithmetic number, because the mean of its divisors is an integer number (15833448).

Almost surely, 2^89722821 is an apocalyptic number.

It is an amenable number.

89722821 is a deficient number, since it is larger than the sum of its proper divisors (36944763).

89722821 is a wasteful number, since it uses less digits than its factorization.

89722821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759291.

The product of its digits is 32256, while the sum is 39.

The square root of 89722821 is about 9472.2130993765. The cubic root of 89722821 is about 447.6799455256.

The spelling of 89722821 in words is "eighty-nine million, seven hundred twenty-two thousand, eight hundred twenty-one".