90022279 has 2 divisors, whose sum is σ = 90022280. Its totient is φ = 90022278.

The previous prime is 90022237. The next prime is 90022291. The reversal of 90022279 is 97222009.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90022279 - 2²¹ = 87925127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90022279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90022379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45011139 + 45011140.

It is an arithmetic number, because the mean of its divisors is an integer number (45011140).

Almost surely, 2^90022279 is an apocalyptic number.

90022279 is a deficient number, since it is larger than the sum of its proper divisors (1).

90022279 is an equidigital number, since it uses as much as digits as its factorization.

90022279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 90022279 is about 9488.0071142469. The cubic root of 90022279 is about 448.1774498332.

The spelling of 90022279 in words is "ninety million, twenty-two thousand, two hundred seventy-nine".