90245321 has 2 divisors, whose sum is σ = 90245322. Its totient is φ = 90245320.

The previous prime is 90245317. The next prime is 90245339. The reversal of 90245321 is 12354209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83814025 + 6431296 = 9155^2 + 2536^2 .

It is a cyclic number.

It is not a de Polignac number, because 90245321 - 2² = 90245317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90245341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45122660 + 45122661.

It is an arithmetic number, because the mean of its divisors is an integer number (45122661).

Almost surely, 2^90245321 is an apocalyptic number.

It is an amenable number.

90245321 is a deficient number, since it is larger than the sum of its proper divisors (1).

90245321 is an equidigital number, since it uses as much as digits as its factorization.

90245321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 90245321 is about 9499.7537336502. The cubic root of 90245321 is about 448.5472840293.

The spelling of 90245321 in words is "ninety million, two hundred forty-five thousand, three hundred twenty-one".