90909668 has 12 divisors (see below), whose sum is σ = 160160700. Its totient is φ = 45149472.

The previous prime is 90909667. The next prime is 90909671. The reversal of 90909668 is 86690909.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 37356544 + 53553124 = 6112^2 + 7318^2 .

It is not an unprimeable number, because it can be changed into a prime (90909667) 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, 75671 + ... + 76862.

It is an arithmetic number, because the mean of its divisors is an integer number (13346725).

Almost surely, 2^90909668 is an apocalyptic number.

It is an amenable number.

90909668 is a deficient number, since it is larger than the sum of its proper divisors (69251032).

90909668 is a wasteful number, since it uses less digits than its factorization.

90909668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152686 (or 152684 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 47.

The square root of 90909668 is about 9534.6561553105. The cubic root of 90909668 is about 449.6452644680.

The spelling of 90909668 in words is "ninety million, nine hundred nine thousand, six hundred sixty-eight".