90788417 has 16 divisors (see below), whose sum is σ = 96558912. Its totient is φ = 85250880.

The previous prime is 90788413. The next prime is 90788419. The reversal of 90788417 is 71488709.

It is a cyclic number.

It is not a de Polignac number, because 90788417 - 2² = 90788413 is a prime.

It is a super-2 number, since 2×90788417² = 16485073322731778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90788413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131042 + ... + 131732.

It is an arithmetic number, because the mean of its divisors is an integer number (6034932).

Almost surely, 2^90788417 is an apocalyptic number.

It is an amenable number.

90788417 is a deficient number, since it is larger than the sum of its proper divisors (5770495).

90788417 is a wasteful number, since it uses less digits than its factorization.

90788417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 90788417 is about 9528.2955978496. The cubic root of 90788417 is about 449.4452703572.

The spelling of 90788417 in words is "ninety million, seven hundred eighty-eight thousand, four hundred seventeen".