90806479 has 4 divisors (see below), whose sum is σ = 90830320. Its totient is φ = 90782640.

The previous prime is 90806467. The next prime is 90806501. The reversal of 90806479 is 97460809.

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 90806479 - 2⁵ = 90806447 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 (90806459) 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, 4782 + ... + 14299.

It is an arithmetic number, because the mean of its divisors is an integer number (22707580).

Almost surely, 2^90806479 is an apocalyptic number.

90806479 is a deficient number, since it is larger than the sum of its proper divisors (23841).

90806479 is a wasteful number, since it uses less digits than its factorization.

90806479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23840.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 90806479 is about 9529.2433592600. The cubic root of 90806479 is about 449.4750735063.

The spelling of 90806479 in words is "ninety million, eight hundred six thousand, four hundred seventy-nine".