90983617 has 2 divisors, whose sum is σ = 90983618. Its totient is φ = 90983616.

The previous prime is 90983611. The next prime is 90983621. The reversal of 90983617 is 71638909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62157456 + 28826161 = 7884^2 + 5369^2 .

It is an emirp because it is prime and its reverse (71638909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90983617 - 2⁷ = 90983489 is a prime.

It is not a weakly prime, because it can be changed into another prime (90983611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45491808 + 45491809.

It is an arithmetic number, because the mean of its divisors is an integer number (45491809).

Almost surely, 2^90983617 is an apocalyptic number.

It is an amenable number.

90983617 is a deficient number, since it is larger than the sum of its proper divisors (1).

90983617 is an equidigital number, since it uses as much as digits as its factorization.

90983617 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 90983617 is about 9538.5332729933. The cubic root of 90983617 is about 449.7671503161.

The spelling of 90983617 in words is "ninety million, nine hundred eighty-three thousand, six hundred seventeen".