90983489 has 2 divisors, whose sum is σ = 90983490. Its totient is φ = 90983488.

The previous prime is 90983483. The next prime is 90983509. The reversal of 90983489 is 98438909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78145600 + 12837889 = 8840^2 + 3583^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90983489 is a prime.

It is a super-2 number, since 2×90983489² = 16555990541226242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90983483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45491744 + 45491745.

It is an arithmetic number, because the mean of its divisors is an integer number (45491745).

Almost surely, 2^90983489 is an apocalyptic number.

It is an amenable number.

90983489 is a deficient number, since it is larger than the sum of its proper divisors (1).

90983489 is an equidigital number, since it uses as much as digits as its factorization.

90983489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 50.

The square root of 90983489 is about 9538.5265633640. The cubic root of 90983489 is about 449.7669393982.

The spelling of 90983489 in words is "ninety million, nine hundred eighty-three thousand, four hundred eighty-nine".