369686921 has 2 divisors, whose sum is σ = 369686922. Its totient is φ = 369686920.

The previous prime is 369686917. The next prime is 369686939. The reversal of 369686921 is 129686963.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 366301321 + 3385600 = 19139^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 369686921 - 2² = 369686917 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 369686921.

It is not a weakly prime, because it can be changed into another prime (369686621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184843460 + 184843461.

It is an arithmetic number, because the mean of its divisors is an integer number (184843461).

Almost surely, 2^369686921 is an apocalyptic number.

It is an amenable number.

369686921 is a deficient number, since it is larger than the sum of its proper divisors (1).

369686921 is an equidigital number, since it uses as much as digits as its factorization.

369686921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 50.

The square root of 369686921 is about 19227.2442383197. The cubic root of 369686921 is about 717.7028905761.

The spelling of 369686921 in words is "three hundred sixty-nine million, six hundred eighty-six thousand, nine hundred twenty-one".