89776579993 has 4 divisors (see below), whose sum is σ = 91248327268. Its totient is φ = 88304832720.

The previous prime is 89776579931. The next prime is 89776580039. The reversal of 89776579993 is 39997567798.

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

It can be written as a sum of positive squares in 2 ways, for example, as 26437784409 + 63338795584 = 162597^2 + 251672^2 .

It is a cyclic number.

It is not a de Polignac number, because 89776579993 - 2²¹ = 89774482841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (89776579493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 735873546 + ... + 735873667.

It is an arithmetic number, because the mean of its divisors is an integer number (22812081817).

Almost surely, 2^89776579993 is an apocalyptic number.

It is an amenable number.

89776579993 is a deficient number, since it is larger than the sum of its proper divisors (1471747275).

89776579993 is a wasteful number, since it uses less digits than its factorization.

89776579993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471747274.

The product of its digits is 1620304560, while the sum is 79.

The spelling of 89776579993 in words is "eighty-nine billion, seven hundred seventy-six million, five hundred seventy-nine thousand, nine hundred ninety-three".