90919117 has 2 divisors, whose sum is σ = 90919118. Its totient is φ = 90919116.

The previous prime is 90919093. The next prime is 90919141. The reversal of 90919117 is 71191909.

It is a balanced prime because it is at equal distance from previous prime (90919093) and next prime (90919141).

It can be written as a sum of positive squares in only one way, i.e., 74321641 + 16597476 = 8621^2 + 4074^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90919117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90919217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45459558 + 45459559.

It is an arithmetic number, because the mean of its divisors is an integer number (45459559).

Almost surely, 2^90919117 is an apocalyptic number.

It is an amenable number.

90919117 is a deficient number, since it is larger than the sum of its proper divisors (1).

90919117 is an equidigital number, since it uses as much as digits as its factorization.

90919117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5103, while the sum is 37.

The square root of 90919117 is about 9535.1516506032. The cubic root of 90919117 is about 449.6608423891.

The spelling of 90919117 in words is "ninety million, nine hundred nineteen thousand, one hundred seventeen".