90636361 has 2 divisors, whose sum is σ = 90636362. Its totient is φ = 90636360.

The previous prime is 90636319. The next prime is 90636419. The reversal of 90636361 is 16363609.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58430736 + 32205625 = 7644^2 + 5675^2 .

It is a cyclic number.

It is not a de Polignac number, because 90636361 - 2¹³ = 90628169 is a prime.

It is not a weakly prime, because it can be changed into another prime (90639361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45318180 + 45318181.

It is an arithmetic number, because the mean of its divisors is an integer number (45318181).

Almost surely, 2^90636361 is an apocalyptic number.

It is an amenable number.

90636361 is a deficient number, since it is larger than the sum of its proper divisors (1).

90636361 is an equidigital number, since it uses as much as digits as its factorization.

90636361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 90636361 is about 9520.3130725833. The cubic root of 90636361 is about 449.1942139591.

The spelling of 90636361 in words is "ninety million, six hundred thirty-six thousand, three hundred sixty-one".