90782309 has 2 divisors, whose sum is σ = 90782310. Its totient is φ = 90782308.

The previous prime is 90782303. The next prime is 90782327. The reversal of 90782309 is 90328709.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84916225 + 5866084 = 9215^2 + 2422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90782309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90782303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45391154 + 45391155.

It is an arithmetic number, because the mean of its divisors is an integer number (45391155).

Almost surely, 2^90782309 is an apocalyptic number.

It is an amenable number.

90782309 is a deficient number, since it is larger than the sum of its proper divisors (1).

90782309 is an equidigital number, since it uses as much as digits as its factorization.

90782309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 90782309 is about 9527.9750734351. The cubic root of 90782309 is about 449.4351909757.

The spelling of 90782309 in words is "ninety million, seven hundred eighty-two thousand, three hundred nine".