90981608 has 16 divisors (see below), whose sum is σ = 172281060. Its totient is φ = 45040000.

The previous prime is 90981589. The next prime is 90981619. The reversal of 90981608 is 80618909.

It can be written as a sum of positive squares in 2 ways, for example, as 78464164 + 12517444 = 8858^2 + 3538^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55493 + ... + 57108.

Almost surely, 2^90981608 is an apocalyptic number.

It is an amenable number.

90981608 is a deficient number, since it is larger than the sum of its proper divisors (81299452).

90981608 is a wasteful number, since it uses less digits than its factorization.

90981608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112708 (or 112704 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 90981608 is about 9538.4279627201. The cubic root of 90981608 is about 449.7638398708.

The spelling of 90981608 in words is "ninety million, nine hundred eighty-one thousand, six hundred eight".