90578479 has 4 divisors (see below), whose sum is σ = 93026584. Its totient is φ = 88130376.

The previous prime is 90578461. The next prime is 90578483. The reversal of 90578479 is 97487509.

It is a happy number.

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 90578479 - 2¹³ = 90570287 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90578419) 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, 1223997 + ... + 1224070.

It is an arithmetic number, because the mean of its divisors is an integer number (23256646).

Almost surely, 2^90578479 is an apocalyptic number.

90578479 is a deficient number, since it is larger than the sum of its proper divisors (2448105).

90578479 is a wasteful number, since it uses less digits than its factorization.

90578479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448104.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 90578479 is about 9517.2726660530. The cubic root of 90578479 is about 449.0985724457.

The spelling of 90578479 in words is "ninety million, five hundred seventy-eight thousand, four hundred seventy-nine".