2757649 has 2 divisors, whose sum is σ = 2757650. Its totient is φ = 2757648.

The previous prime is 2757617. The next prime is 2757659. The reversal of 2757649 is 9467572.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1476225 + 1281424 = 1215^2 + 1132^2 .

It is a cyclic number.

It is not a de Polignac number, because 2757649 - 2⁵ = 2757617 is a prime.

It is not a weakly prime, because it can be changed into another prime (2757659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1378824 + 1378825.

It is an arithmetic number, because the mean of its divisors is an integer number (1378825).

2^2757649 is an apocalyptic number.

It is an amenable number.

2757649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2757649 is an equidigital number, since it uses as much as digits as its factorization.

2757649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 40.

The square root of 2757649 is about 1660.6170539893. The cubic root of 2757649 is about 140.2317420360.

The spelling of 2757649 in words is "two million, seven hundred fifty-seven thousand, six hundred forty-nine".