368638643 has 2 divisors, whose sum is σ = 368638644. Its totient is φ = 368638642.

The previous prime is 368638609. The next prime is 368638679. The reversal of 368638643 is 346836863.

It is a weak prime.

It is an emirp because it is prime and its reverse (346836863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 368638643 - 2¹⁴ = 368622259 is a prime.

It is a super-2 number, since 2×368638643² = 271788898225762898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (368631643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 184319321 + 184319322.

It is an arithmetic number, because the mean of its divisors is an integer number (184319322).

Almost surely, 2^368638643 is an apocalyptic number.

368638643 is a deficient number, since it is larger than the sum of its proper divisors (1).

368638643 is an equidigital number, since it uses as much as digits as its factorization.

368638643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 47.

The square root of 368638643 is about 19199.9646614258. The cubic root of 368638643 is about 717.0238796352.

The spelling of 368638643 in words is "three hundred sixty-eight million, six hundred thirty-eight thousand, six hundred forty-three".