183391961 has 2 divisors, whose sum is σ = 183391962. Its totient is φ = 183391960.

The previous prime is 183391921. The next prime is 183391991. The reversal of 183391961 is 169193381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130393561 + 52998400 = 11419^2 + 7280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-183391961 is a prime.

It is a super-2 number, since 2×183391961² = 67265222718851042, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (183391921) 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, 91695980 + 91695981.

It is an arithmetic number, because the mean of its divisors is an integer number (91695981).

Almost surely, 2^183391961 is an apocalyptic number.

It is an amenable number.

183391961 is a deficient number, since it is larger than the sum of its proper divisors (1).

183391961 is an equidigital number, since it uses as much as digits as its factorization.

183391961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 41.

The square root of 183391961 is about 13542.2288047426. The cubic root of 183391961 is about 568.1461893516.

The spelling of 183391961 in words is "one hundred eighty-three million, three hundred ninety-one thousand, nine hundred sixty-one".