90322993 has 2 divisors, whose sum is σ = 90322994. Its totient is φ = 90322992.

The previous prime is 90322951. The next prime is 90322997. The reversal of 90322993 is 39922309.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86434209 + 3888784 = 9297^2 + 1972^2 .

It is a cyclic number.

It is not a de Polignac number, because 90322993 - 2¹⁷ = 90191921 is a prime.

It is not a weakly prime, because it can be changed into another prime (90322997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45161496 + 45161497.

It is an arithmetic number, because the mean of its divisors is an integer number (45161497).

Almost surely, 2^90322993 is an apocalyptic number.

It is an amenable number.

90322993 is a deficient number, since it is larger than the sum of its proper divisors (1).

90322993 is an equidigital number, since it uses as much as digits as its factorization.

90322993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 90322993 is about 9503.8409603697. The cubic root of 90322993 is about 448.6759317857.

The spelling of 90322993 in words is "ninety million, three hundred twenty-two thousand, nine hundred ninety-three".