90936217 has 2 divisors, whose sum is σ = 90936218. Its totient is φ = 90936216.

The previous prime is 90936143. The next prime is 90936221. The reversal of 90936217 is 71263909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52359696 + 38576521 = 7236^2 + 6211^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90936217 is a prime.

It is not a weakly prime, because it can be changed into another prime (90936617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45468108 + 45468109.

It is an arithmetic number, because the mean of its divisors is an integer number (45468109).

Almost surely, 2^90936217 is an apocalyptic number.

It is an amenable number.

90936217 is a deficient number, since it is larger than the sum of its proper divisors (1).

90936217 is an equidigital number, since it uses as much as digits as its factorization.

90936217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 90936217 is about 9536.0482905656. The cubic root of 90936217 is about 449.6890312477.

The spelling of 90936217 in words is "ninety million, nine hundred thirty-six thousand, two hundred seventeen".