379651721 has 2 divisors, whose sum is σ = 379651722. Its totient is φ = 379651720.

The previous prime is 379651693. The next prime is 379651751. The reversal of 379651721 is 127156973.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374964496 + 4687225 = 19364^2 + 2165^2 .

It is a cyclic number.

It is not a de Polignac number, because 379651721 - 2¹⁰ = 379650697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (379651751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189825860 + 189825861.

It is an arithmetic number, because the mean of its divisors is an integer number (189825861).

Almost surely, 2^379651721 is an apocalyptic number.

It is an amenable number.

379651721 is a deficient number, since it is larger than the sum of its proper divisors (1).

379651721 is an equidigital number, since it uses as much as digits as its factorization.

379651721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 41.

The square root of 379651721 is about 19484.6534739523. The cubic root of 379651721 is about 724.0942925580.

The spelling of 379651721 in words is "three hundred seventy-nine million, six hundred fifty-one thousand, seven hundred twenty-one".