90864073 has 2 divisors, whose sum is σ = 90864074. Its totient is φ = 90864072.

The previous prime is 90864043. The next prime is 90864121. The reversal of 90864073 is 37046809.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79085449 + 11778624 = 8893^2 + 3432^2 .

It is a cyclic number.

It is not a de Polignac number, because 90864073 - 2⁵ = 90864041 is a prime.

It is not a weakly prime, because it can be changed into another prime (90864013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45432036 + 45432037.

It is an arithmetic number, because the mean of its divisors is an integer number (45432037).

Almost surely, 2^90864073 is an apocalyptic number.

It is an amenable number.

90864073 is a deficient number, since it is larger than the sum of its proper divisors (1).

90864073 is an equidigital number, since it uses as much as digits as its factorization.

90864073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 90864073 is about 9532.2648410543. The cubic root of 90864073 is about 449.5700799296.

The spelling of 90864073 in words is "ninety million, eight hundred sixty-four thousand, seventy-three".