90579121 has 4 divisors (see below), whose sum is σ = 90613744. Its totient is φ = 90544500.

The previous prime is 90579119. The next prime is 90579131. The reversal of 90579121 is 12197509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90579121 - 2¹ = 90579119 is a prime.

It is a super-2 number, since 2×90579121² = 16409154322265282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90579131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13035 + ... + 18736.

It is an arithmetic number, because the mean of its divisors is an integer number (22653436).

Almost surely, 2^90579121 is an apocalyptic number.

It is an amenable number.

90579121 is a deficient number, since it is larger than the sum of its proper divisors (34623).

90579121 is a wasteful number, since it uses less digits than its factorization.

90579121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34622.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 90579121 is about 9517.3063941433. The cubic root of 90579121 is about 449.0996334799.

The spelling of 90579121 in words is "ninety million, five hundred seventy-nine thousand, one hundred twenty-one".