90220201 has 2 divisors, whose sum is σ = 90220202. Its totient is φ = 90220200.

The previous prime is 90220181. The next prime is 90220211. The reversal of 90220201 is 10202209.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64818601 + 25401600 = 8051^2 + 5040^2 .

It is a cyclic number.

It is not a de Polignac number, because 90220201 - 2¹³ = 90212009 is a prime.

It is not a weakly prime, because it can be changed into another prime (90220211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45110100 + 45110101.

It is an arithmetic number, because the mean of its divisors is an integer number (45110101).

Almost surely, 2^90220201 is an apocalyptic number.

It is an amenable number.

90220201 is a deficient number, since it is larger than the sum of its proper divisors (1).

90220201 is an equidigital number, since it uses as much as digits as its factorization.

90220201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 90220201 is about 9498.4315020955. The cubic root of 90220201 is about 448.5056620990.

The spelling of 90220201 in words is "ninety million, two hundred twenty thousand, two hundred one".