89631976997 has 8 divisors (see below), whose sum is σ = 90258948120. Its totient is φ = 89007114240.

The previous prime is 89631976991. The next prime is 89631977003. The reversal of 89631976997 is 79967913698.

It is a Cunningham number, because it is equal to 299386²+1.

It is an interprime number because it is at equal distance from previous prime (89631976991) and next prime (89631977003).

It can be written as a sum of positive squares in 4 ways, for example, as 36414562276 + 53217414721 = 190826^2 + 230689^2 .

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 89631976997 - 2²⁸ = 89363541541 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 (89631976991) 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, 441722 + ... + 611867.

It is an arithmetic number, because the mean of its divisors is an integer number (11282368515).

Almost surely, 2^89631976997 is an apocalyptic number.

It is an amenable number.

89631976997 is a deficient number, since it is larger than the sum of its proper divisors (626971123).

89631976997 is a wasteful number, since it uses less digits than its factorization.

89631976997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1054183.

The product of its digits is 277766496, while the sum is 74.

The spelling of 89631976997 in words is "eighty-nine billion, six hundred thirty-one million, nine hundred seventy-six thousand, nine hundred ninety-seven".