2721619 has 2 divisors, whose sum is σ = 2721620. Its totient is φ = 2721618.

The previous prime is 2721577. The next prime is 2721671. The reversal of 2721619 is 9161272.

It is a happy number.

2721619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2721619 - 2¹³ = 2713427 is a prime.

It is a super-2 number, since 2×2721619² = 14814419962322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2721119) 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, 1360809 + 1360810.

It is an arithmetic number, because the mean of its divisors is an integer number (1360810).

2^2721619 is an apocalyptic number.

2721619 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721619 is an equidigital number, since it uses as much as digits as its factorization.

2721619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 28.

The square root of 2721619 is about 1649.7330087017. The cubic root of 2721619 is about 139.6183311861.

It can be divided in two parts, 272 and 1619, that added together give a triangular number (1891 = T₆₁).

The spelling of 2721619 in words is "two million, seven hundred twenty-one thousand, six hundred nineteen".