90732885961 has 3 divisors (see below), whose sum is σ = 90733187181. Its totient is φ = 90732584742.

The previous prime is 90732885923. The next prime is 90732885967. The reversal of 90732885961 is 16958823709.

The square root of 90732885961 is 301219.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16958823709 = 89 ⋅190548581.

It is not a de Polignac number, because 90732885961 - 2⁷ = 90732885833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90732885896 and 90732885905.

It is not an unprimeable number, because it can be changed into a prime (90732885967) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 150610 + ... + 451828.

It is an arithmetic number, because the mean of its divisors is an integer number (30244395727).

Almost surely, 2^90732885961 is an apocalyptic number.

90732885961 is the 301219-th square number.

90732885961 is the 150610-th centered octagonal number.

It is an amenable number.

90732885961 is a deficient number, since it is larger than the sum of its proper divisors (301220).

90732885961 is an frugal number, since it uses more digits than its factorization.

90732885961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602438 (or 301219 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 90732885961 in words is "ninety billion, seven hundred thirty-two million, eight hundred eighty-five thousand, nine hundred sixty-one".