90223957 has 2 divisors, whose sum is σ = 90223958. Its totient is φ = 90223956.

The previous prime is 90223909. The next prime is 90223979. The reversal of 90223957 is 75932209.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86378436 + 3845521 = 9294^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 90223957 - 2¹¹ = 90221909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90223907) 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, 45111978 + 45111979.

It is an arithmetic number, because the mean of its divisors is an integer number (45111979).

Almost surely, 2^90223957 is an apocalyptic number.

It is an amenable number.

90223957 is a deficient number, since it is larger than the sum of its proper divisors (1).

90223957 is an equidigital number, since it uses as much as digits as its factorization.

90223957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 90223957 is about 9498.6292168923. The cubic root of 90223957 is about 448.5118859967.

The spelling of 90223957 in words is "ninety million, two hundred twenty-three thousand, nine hundred fifty-seven".