183990689 has 2 divisors, whose sum is σ = 183990690. Its totient is φ = 183990688.

The previous prime is 183990671. The next prime is 183990691. The reversal of 183990689 is 986099381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116208400 + 67782289 = 10780^2 + 8233^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-183990689 is a prime.

Together with 183990691, it forms a pair of twin primes.

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 183990689.

It is not a weakly prime, because it can be changed into another prime (183990619) 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, 91995344 + 91995345.

It is an arithmetic number, because the mean of its divisors is an integer number (91995345).

Almost surely, 2^183990689 is an apocalyptic number.

It is an amenable number.

183990689 is a deficient number, since it is larger than the sum of its proper divisors (1).

183990689 is an equidigital number, since it uses as much as digits as its factorization.

183990689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 183990689 is about 13564.3167538951. The cubic root of 183990689 is about 568.7638018790.

The spelling of 183990689 in words is "one hundred eighty-three million, nine hundred ninety thousand, six hundred eighty-nine".