90668215 has 8 divisors (see below), whose sum is σ = 118693008. Its totient is φ = 65940480.

The previous prime is 90668203. The next prime is 90668233. The reversal of 90668215 is 51286609.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90668215 - 2²³ = 82279607 is a prime.

It is a super-2 number, since 2×90668215² = 16441450422572450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824202 + ... + 824311.

It is an arithmetic number, because the mean of its divisors is an integer number (14836626).

Almost surely, 2^90668215 is an apocalyptic number.

90668215 is a deficient number, since it is larger than the sum of its proper divisors (28024793).

90668215 is a wasteful number, since it uses less digits than its factorization.

90668215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648529.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 90668215 is about 9521.9858748057. The cubic root of 90668215 is about 449.2468306514.

The spelling of 90668215 in words is "ninety million, six hundred sixty-eight thousand, two hundred fifteen".