2749709 has 2 divisors, whose sum is σ = 2749710. Its totient is φ = 2749708.

The previous prime is 2749687. The next prime is 2749711. The reversal of 2749709 is 9079472.

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., 2592100 + 157609 = 1610^2 + 397^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2749709 is a prime.

Together with 2749711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2749309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1374854 + 1374855.

It is an arithmetic number, because the mean of its divisors is an integer number (1374855).

2^2749709 is an apocalyptic number.

It is an amenable number.

2749709 is a deficient number, since it is larger than the sum of its proper divisors (1).

2749709 is an equidigital number, since it uses as much as digits as its factorization.

2749709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 2749709 is about 1658.2246530552. The cubic root of 2749709 is about 140.0970245800.

The spelling of 2749709 in words is "two million, seven hundred forty-nine thousand, seven hundred nine".