368668721 has 2 divisors, whose sum is σ = 368668722. Its totient is φ = 368668720.

The previous prime is 368668717. The next prime is 368668739. The reversal of 368668721 is 127866863.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252460321 + 116208400 = 15889^2 + 10780^2 .

It is a cyclic number.

It is not a de Polignac number, because 368668721 - 2² = 368668717 is a prime.

It is not a weakly prime, because it can be changed into another prime (368668711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184334360 + 184334361.

It is an arithmetic number, because the mean of its divisors is an integer number (184334361).

Almost surely, 2^368668721 is an apocalyptic number.

It is an amenable number.

368668721 is a deficient number, since it is larger than the sum of its proper divisors (1).

368668721 is an equidigital number, since it uses as much as digits as its factorization.

368668721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 47.

The square root of 368668721 is about 19200.7479281407. The cubic root of 368668721 is about 717.0433802656.

The spelling of 368668721 in words is "three hundred sixty-eight million, six hundred sixty-eight thousand, seven hundred twenty-one".