90579871 has 4 divisors (see below), whose sum is σ = 90848992. Its totient is φ = 90310752.

The previous prime is 90579869. The next prime is 90579877. The reversal of 90579871 is 17897509.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90579871 - 2¹ = 90579869 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 (90579877) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134055 + ... + 134728.

It is an arithmetic number, because the mean of its divisors is an integer number (22712248).

Almost surely, 2^90579871 is an apocalyptic number.

90579871 is a deficient number, since it is larger than the sum of its proper divisors (269121).

90579871 is a wasteful number, since it uses less digits than its factorization.

90579871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269120.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 90579871 is about 9517.3457959664. The cubic root of 90579871 is about 449.1008729996.

The spelling of 90579871 in words is "ninety million, five hundred seventy-nine thousand, eight hundred seventy-one".