89688772021 has 16 divisors (see below), whose sum is σ = 94038582528. Its totient is φ = 85376966400.

The previous prime is 89688772013. The next prime is 89688772049. The reversal of 89688772021 is 12027788698.

It is a cyclic number.

It is not a de Polignac number, because 89688772021 - 2³ = 89688772013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89688772081) 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, 10144815 + ... + 10153651.

It is an arithmetic number, because the mean of its divisors is an integer number (5877411408).

Almost surely, 2^89688772021 is an apocalyptic number.

It is an amenable number.

89688772021 is a deficient number, since it is larger than the sum of its proper divisors (4349810507).

89688772021 is a wasteful number, since it uses less digits than its factorization.

89688772021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10932.

The product of its (nonzero) digits is 5419008, while the sum is 58.

The spelling of 89688772021 in words is "eighty-nine billion, six hundred eighty-eight million, seven hundred seventy-two thousand, twenty-one".