90316789 has 2 divisors, whose sum is σ = 90316790. Its totient is φ = 90316788.

The previous prime is 90316769. The next prime is 90316847. The reversal of 90316789 is 98761309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52678564 + 37638225 = 7258^2 + 6135^2 .

It is a cyclic number.

It is not a de Polignac number, because 90316789 - 2⁹ = 90316277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90316769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45158394 + 45158395.

It is an arithmetic number, because the mean of its divisors is an integer number (45158395).

Almost surely, 2^90316789 is an apocalyptic number.

It is an amenable number.

90316789 is a deficient number, since it is larger than the sum of its proper divisors (1).

90316789 is an equidigital number, since it uses as much as digits as its factorization.

90316789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 90316789 is about 9503.5145604140. The cubic root of 90316789 is about 448.6656588415.

The spelling of 90316789 in words is "ninety million, three hundred sixteen thousand, seven hundred eighty-nine".