90933217 has 2 divisors, whose sum is σ = 90933218. Its totient is φ = 90933216.

The previous prime is 90933197. The next prime is 90933233. The reversal of 90933217 is 71233909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88190881 + 2742336 = 9391^2 + 1656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90933217 is a prime.

It is not a weakly prime, because it can be changed into another prime (90933317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45466608 + 45466609.

It is an arithmetic number, because the mean of its divisors is an integer number (45466609).

Almost surely, 2^90933217 is an apocalyptic number.

It is an amenable number.

90933217 is a deficient number, since it is larger than the sum of its proper divisors (1).

90933217 is an equidigital number, since it uses as much as digits as its factorization.

90933217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 90933217 is about 9535.8909914071. The cubic root of 90933217 is about 449.6840860895.

The spelling of 90933217 in words is "ninety million, nine hundred thirty-three thousand, two hundred seventeen".