90418779 has 12 divisors (see below), whose sum is σ = 142478232. Its totient is φ = 54799200.

The previous prime is 90418753. The next prime is 90418799. The reversal of 90418779 is 97781409.

It is not a de Polignac number, because 90418779 - 2⁵ = 90418747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90418799) 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, 456562 + ... + 456759.

It is an arithmetic number, because the mean of its divisors is an integer number (11873186).

Almost surely, 2^90418779 is an apocalyptic number.

90418779 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

90418779 is a deficient number, since it is larger than the sum of its proper divisors (52059453).

90418779 is a wasteful number, since it uses less digits than its factorization.

90418779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913338 (or 913335 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 90418779 is about 9508.8789560074. The cubic root of 90418779 is about 448.8344801547.

It can be divided in two parts, 904 and 18779, that added together give a 9-th power (19683 = 3⁹).

The spelling of 90418779 in words is "ninety million, four hundred eighteen thousand, seven hundred seventy-nine".