90784597 has 2 divisors, whose sum is σ = 90784598. Its totient is φ = 90784596.

The previous prime is 90784591. The next prime is 90784609. The reversal of 90784597 is 79548709.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89851441 + 933156 = 9479^2 + 966^2 .

It is a cyclic number.

It is not a de Polignac number, because 90784597 - 2⁷ = 90784469 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90784597.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90784591) 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, 45392298 + 45392299.

It is an arithmetic number, because the mean of its divisors is an integer number (45392299).

Almost surely, 2^90784597 is an apocalyptic number.

It is an amenable number.

90784597 is a deficient number, since it is larger than the sum of its proper divisors (1).

90784597 is an equidigital number, since it uses as much as digits as its factorization.

90784597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 635040, while the sum is 49.

The square root of 90784597 is about 9528.0951401631. The cubic root of 90784597 is about 449.4389666712.

The spelling of 90784597 in words is "ninety million, seven hundred eighty-four thousand, five hundred ninety-seven".