90471579 has 12 divisors (see below), whose sum is σ = 132592488. Its totient is φ = 54831040.

The previous prime is 90471533. The next prime is 90471593. The reversal of 90471579 is 97517409.

It is a happy number.

It is not a de Polignac number, because 90471579 - 2⁹ = 90471067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90471579.

It is not an unprimeable number, because it can be changed into a prime (90471779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 124254 + ... + 124979.

It is an arithmetic number, because the mean of its divisors is an integer number (11049374).

Almost surely, 2^90471579 is an apocalyptic number.

90471579 is a deficient number, since it is larger than the sum of its proper divisors (42120909).

90471579 is a wasteful number, since it uses less digits than its factorization.

90471579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249258 (or 249247 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 90471579 is about 9511.6549033278. The cubic root of 90471579 is about 448.9218287100.

The spelling of 90471579 in words is "ninety million, four hundred seventy-one thousand, five hundred seventy-nine".