90360857 has 2 divisors, whose sum is σ = 90360858. Its totient is φ = 90360856.

The previous prime is 90360847. The next prime is 90360869. The reversal of 90360857 is 75806309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89661961 + 698896 = 9469^2 + 836^2 .

It is a cyclic number.

It is not a de Polignac number, because 90360857 - 2¹⁴ = 90344473 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 90360857.

It is not a weakly prime, because it can be changed into another prime (90360817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45180428 + 45180429.

It is an arithmetic number, because the mean of its divisors is an integer number (45180429).

Almost surely, 2^90360857 is an apocalyptic number.

It is an amenable number.

90360857 is a deficient number, since it is larger than the sum of its proper divisors (1).

90360857 is an equidigital number, since it uses as much as digits as its factorization.

90360857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 90360857 is about 9505.8327883463. The cubic root of 90360857 is about 448.7386190062.

The spelling of 90360857 in words is "ninety million, three hundred sixty thousand, eight hundred fifty-seven".