368968721 has 4 divisors (see below), whose sum is σ = 402511344. Its totient is φ = 335426100.

The previous prime is 368968673. The next prime is 368968723. The reversal of 368968721 is 127869863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-368968721 is a prime.

It is a super-2 number, since 2×368968721² = 272275834152751682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 368968721.

It is not an unprimeable number, because it can be changed into a prime (368968723) 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 in 3 ways as a sum of consecutive naturals, for example, 16771295 + ... + 16771316.

It is an arithmetic number, because the mean of its divisors is an integer number (100627836).

Almost surely, 2^368968721 is an apocalyptic number.

It is an amenable number.

368968721 is a deficient number, since it is larger than the sum of its proper divisors (33542623).

368968721 is a wasteful number, since it uses less digits than its factorization.

368968721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33542622.

The product of its digits is 870912, while the sum is 50.

The square root of 368968721 is about 19208.5585351947. The cubic root of 368968721 is about 717.2378228456.

The spelling of 368968721 in words is "three hundred sixty-eight million, nine hundred sixty-eight thousand, seven hundred twenty-one".