90926974681 has 9 divisors (see below), whose sum is σ = 91302730869. Its totient is φ = 90552762300.

The previous prime is 90926974661. The next prime is 90926974687. The reversal of 90926974681 is 18647962909.

The square root of 90926974681 is 301541.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 90926974681 - 2¹³ = 90926966489 is a prime.

It is a super-2 number, since 2×90926974681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90926974687) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 99809616 + ... + 99810526.

Almost surely, 2^90926974681 is an apocalyptic number.

90926974681 is the 301541-st square number.

90926974681 is the 150771-st centered octagonal number.

It is an amenable number.

90926974681 is a deficient number, since it is larger than the sum of its proper divisors (375756188).

90926974681 is an frugal number, since it uses more digits than its factorization.

90926974681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 90926974681 in words is "ninety billion, nine hundred twenty-six million, nine hundred seventy-four thousand, six hundred eighty-one".