361656689 has 2 divisors, whose sum is σ = 361656690. Its totient is φ = 361656688.

The previous prime is 361656679. The next prime is 361656719. The reversal of 361656689 is 986656163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 292683664 + 68973025 = 17108^2 + 8305^2 .

It is a cyclic number.

It is not a de Polignac number, because 361656689 - 2²⁰ = 360608113 is a prime.

It is not a weakly prime, because it can be changed into another prime (361656649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180828344 + 180828345.

It is an arithmetic number, because the mean of its divisors is an integer number (180828345).

Almost surely, 2^361656689 is an apocalyptic number.

It is an amenable number.

361656689 is a deficient number, since it is larger than the sum of its proper divisors (1).

361656689 is an equidigital number, since it uses as much as digits as its factorization.

361656689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 50.

The square root of 361656689 is about 19017.2734375883. The cubic root of 361656689 is about 712.4682256888.

The spelling of 361656689 in words is "three hundred sixty-one million, six hundred fifty-six thousand, six hundred eighty-nine".