375868721 has 2 divisors, whose sum is σ = 375868722. Its totient is φ = 375868720.

The previous prime is 375868699. The next prime is 375868777. The reversal of 375868721 is 127868573.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285238321 + 90630400 = 16889^2 + 9520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-375868721 is a prime.

It is a super-3 number, since 3×375868721³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (375868781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 187934360 + 187934361.

It is an arithmetic number, because the mean of its divisors is an integer number (187934361).

Almost surely, 2^375868721 is an apocalyptic number.

It is an amenable number.

375868721 is a deficient number, since it is larger than the sum of its proper divisors (1).

375868721 is an equidigital number, since it uses as much as digits as its factorization.

375868721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 47.

The square root of 375868721 is about 19387.3340353954. The cubic root of 375868721 is about 721.6812057038.

The spelling of 375868721 in words is "three hundred seventy-five million, eight hundred sixty-eight thousand, seven hundred twenty-one".