2379721 has 2 divisors, whose sum is σ = 2379722. Its totient is φ = 2379720.

The previous prime is 2379703. The next prime is 2379733. The reversal of 2379721 is 1279732.

2379721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1638400 + 741321 = 1280^2 + 861^2 .

It is a cyclic number.

It is not a de Polignac number, because 2379721 - 2¹¹ = 2377673 is a prime.

It is not a weakly prime, because it can be changed into another prime (2379761) 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, 1189860 + 1189861.

It is an arithmetic number, because the mean of its divisors is an integer number (1189861).

2^2379721 is an apocalyptic number.

It is an amenable number.

2379721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2379721 is an equidigital number, since it uses as much as digits as its factorization.

2379721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 31.

The square root of 2379721 is about 1542.6344349845. The cubic root of 2379721 is about 133.5084276032.

The spelling of 2379721 in words is "two million, three hundred seventy-nine thousand, seven hundred twenty-one".