90920201 has 2 divisors, whose sum is σ = 90920202. Its totient is φ = 90920200.

The previous prime is 90920197. The next prime is 90920209. The reversal of 90920201 is 10202909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47623801 + 43296400 = 6901^2 + 6580^2 .

It is an emirp because it is prime and its reverse (10202909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90920201 - 2² = 90920197 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90920209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45460100 + 45460101.

It is an arithmetic number, because the mean of its divisors is an integer number (45460101).

Almost surely, 2^90920201 is an apocalyptic number.

It is an amenable number.

90920201 is a deficient number, since it is larger than the sum of its proper divisors (1).

90920201 is an equidigital number, since it uses as much as digits as its factorization.

90920201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 90920201 is about 9535.2084927389. The cubic root of 90920201 is about 449.6626294369.

The spelling of 90920201 in words is "ninety million, nine hundred twenty thousand, two hundred one".