90617647 has 2 divisors, whose sum is σ = 90617648. Its totient is φ = 90617646.

The previous prime is 90617627. The next prime is 90617689. The reversal of 90617647 is 74671609.

It is a weak prime.

It is an emirp because it is prime and its reverse (74671609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90617647 - 2⁷ = 90617519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90617627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45308823 + 45308824.

It is an arithmetic number, because the mean of its divisors is an integer number (45308824).

Almost surely, 2^90617647 is an apocalyptic number.

90617647 is a deficient number, since it is larger than the sum of its proper divisors (1).

90617647 is an equidigital number, since it uses as much as digits as its factorization.

90617647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 90617647 is about 9519.3301760155. The cubic root of 90617647 is about 449.1632962750.

The spelling of 90617647 in words is "ninety million, six hundred seventeen thousand, six hundred forty-seven".