90358217 has 2 divisors, whose sum is σ = 90358218. Its totient is φ = 90358216.

The previous prime is 90358207. The next prime is 90358223. The reversal of 90358217 is 71285309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49857721 + 40500496 = 7061^2 + 6364^2 .

It is an emirp because it is prime and its reverse (71285309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90358217 - 2⁶ = 90358153 is a prime.

It is equal to p_5236658 and since 90358217 and 5236658 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (90358207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45179108 + 45179109.

It is an arithmetic number, because the mean of its divisors is an integer number (45179109).

Almost surely, 2^90358217 is an apocalyptic number.

It is an amenable number.

90358217 is a deficient number, since it is larger than the sum of its proper divisors (1).

90358217 is an equidigital number, since it uses as much as digits as its factorization.

90358217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 90358217 is about 9505.6939252219. The cubic root of 90358217 is about 448.7342488193.

The spelling of 90358217 in words is "ninety million, three hundred fifty-eight thousand, two hundred seventeen".