376021721 has 2 divisors, whose sum is σ = 376021722. Its totient is φ = 376021720.

The previous prime is 376021717. The next prime is 376021729. The reversal of 376021721 is 127120673.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 323604121 + 52417600 = 17989^2 + 7240^2 .

It is an emirp because it is prime and its reverse (127120673) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 376021721 - 2² = 376021717 is a prime.

It is not a weakly prime, because it can be changed into another prime (376021729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188010860 + 188010861.

It is an arithmetic number, because the mean of its divisors is an integer number (188010861).

Almost surely, 2^376021721 is an apocalyptic number.

It is an amenable number.

376021721 is a deficient number, since it is larger than the sum of its proper divisors (1).

376021721 is an equidigital number, since it uses as much as digits as its factorization.

376021721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 376021721 is about 19391.2795090989. The cubic root of 376021721 is about 721.7791142196.

The spelling of 376021721 in words is "three hundred seventy-six million, twenty-one thousand, seven hundred twenty-one".