361668689 has 2 divisors, whose sum is σ = 361668690. Its totient is φ = 361668688.

The previous prime is 361668679. The next prime is 361668733. The reversal of 361668689 is 986866163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 257281600 + 104387089 = 16040^2 + 10217^2 .

It is a cyclic number.

It is not a de Polignac number, because 361668689 - 2²⁴ = 344891473 is a prime.

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 361668689.

It is not a weakly prime, because it can be changed into another prime (361668679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180834344 + 180834345.

It is an arithmetic number, because the mean of its divisors is an integer number (180834345).

Almost surely, 2^361668689 is an apocalyptic number.

It is an amenable number.

361668689 is a deficient number, since it is larger than the sum of its proper divisors (1).

361668689 is an equidigital number, since it uses as much as digits as its factorization.

361668689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 53.

The square root of 361668689 is about 19017.5889376125. The cubic root of 361668689 is about 712.4761056520.

The spelling of 361668689 in words is "three hundred sixty-one million, six hundred sixty-eight thousand, six hundred eighty-nine".