90118479 has 16 divisors (see below), whose sum is σ = 138792960. Its totient is φ = 51404160.

The previous prime is 90118459. The next prime is 90118489. The reversal of 90118479 is 97481109.

It is a happy number.

It is not a de Polignac number, because 90118479 - 2¹⁹ = 89594191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90118459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79759 + ... + 80880.

It is an arithmetic number, because the mean of its divisors is an integer number (8674560).

Almost surely, 2^90118479 is an apocalyptic number.

90118479 is a deficient number, since it is larger than the sum of its proper divisors (48674481).

90118479 is a wasteful number, since it uses less digits than its factorization.

90118479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160670.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 90118479 is about 9493.0753183571. The cubic root of 90118479 is about 448.3370374466.

The spelling of 90118479 in words is "ninety million, one hundred eighteen thousand, four hundred seventy-nine".