379721 has 2 divisors, whose sum is σ = 379722. Its totient is φ = 379720.

The previous prime is 379703. The next prime is 379723. The reversal of 379721 is 127973.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373321 + 6400 = 611^2 + 80^2 .

It is an emirp because it is prime and its reverse (127973) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 379721 - 2¹⁸ = 117577 is a prime.

Together with 379723, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (379723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189860 + 189861.

It is an arithmetic number, because the mean of its divisors is an integer number (189861).

2³⁷⁹⁷²¹ is an apocalyptic number.

It is an amenable number.

379721 is a deficient number, since it is larger than the sum of its proper divisors (1).

379721 is an equidigital number, since it uses as much as digits as its factorization.

379721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2646, while the sum is 29.

The square root of 379721 is about 616.2150598614. The cubic root of 379721 is about 72.4138334219.

It can be divided in two parts, 37972 and 1, that added together give a palindrome (37973).

The spelling of 379721 in words is "three hundred seventy-nine thousand, seven hundred twenty-one".