2721319 has 2 divisors, whose sum is σ = 2721320. Its totient is φ = 2721318.

The previous prime is 2721317. The next prime is 2721371. The reversal of 2721319 is 9131272.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2721319 - 2¹ = 2721317 is a prime.

It is a super-2 number, since 2×2721319² = 14811154199522, which contains 22 as substring.

Together with 2721317, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2721293 and 2721302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2721317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1360659 + 1360660.

It is an arithmetic number, because the mean of its divisors is an integer number (1360660).

2^2721319 is an apocalyptic number.

2721319 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721319 is an equidigital number, since it uses as much as digits as its factorization.

2721319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 2721319 is about 1649.6420823924. The cubic root of 2721319 is about 139.6132010242.

The spelling of 2721319 in words is "two million, seven hundred twenty-one thousand, three hundred nineteen".