90079081 has 3 divisors (see below), whose sum is σ = 90088573. Its totient is φ = 90069590.

The previous prime is 90079079. The next prime is 90079117. The reversal of 90079081 is 18097009.

The square root of 90079081 is 9491.

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.

It is not a de Polignac number, because 90079081 - 2¹ = 90079079 is a prime.

It is a super-2 number, since 2×90079081² = 16228481667609122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90079001) 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, 4746 + ... + 14236.

Almost surely, 2^90079081 is an apocalyptic number.

90079081 is the 9491-st square number.

90079081 is the 4746-th centered octagonal number.

It is an amenable number.

90079081 is a deficient number, since it is larger than the sum of its proper divisors (9492).

90079081 is an frugal number, since it uses more digits than its factorization.

90079081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18982 (or 9491 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 34.

The cubic root of 90079081 is about 448.2716932557.

The spelling of 90079081 in words is "ninety million, seventy-nine thousand, eighty-one".