2725691 has 2 divisors, whose sum is σ = 2725692. Its totient is φ = 2725690.

The previous prime is 2725669. The next prime is 2725693. The reversal of 2725691 is 1965272.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2725691 is a prime.

Together with 2725693, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (2725693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1362845 + 1362846.

It is an arithmetic number, because the mean of its divisors is an integer number (1362846).

2^2725691 is an apocalyptic number.

2725691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2725691 is an equidigital number, since it uses as much as digits as its factorization.

2725691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 2725691 is about 1650.9666865204. The cubic root of 2725691 is about 139.6879273276.

The spelling of 2725691 in words is "two million, seven hundred twenty-five thousand, six hundred ninety-one".