90901117 has 4 divisors (see below), whose sum is σ = 90920380. Its totient is φ = 90881856.

The previous prime is 90901093. The next prime is 90901171. The reversal of 90901117 is 71110909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71110909 = 223 ⋅318883.

It can be written as a sum of positive squares in 2 ways, for example, as 51538041 + 39363076 = 7179^2 + 6274^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90901117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90931117) 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, 2773 + ... + 13765.

It is an arithmetic number, because the mean of its divisors is an integer number (22730095).

Almost surely, 2^90901117 is an apocalyptic number.

It is an amenable number.

90901117 is a deficient number, since it is larger than the sum of its proper divisors (19263).

90901117 is a wasteful number, since it uses less digits than its factorization.

90901117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19262.

The product of its (nonzero) digits is 567, while the sum is 28.

The square root of 90901117 is about 9534.2077279657. The cubic root of 90901117 is about 449.6311660877.

The spelling of 90901117 in words is "ninety million, nine hundred one thousand, one hundred seventeen".