2749649 has 4 divisors (see below), whose sum is σ = 3142464. Its totient is φ = 2356836.

The previous prime is 2749639. The next prime is 2749667. The reversal of 2749649 is 9469472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2749649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2749609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196397 + ... + 196410.

It is an arithmetic number, because the mean of its divisors is an integer number (785616).

2^2749649 is an apocalyptic number.

It is an amenable number.

2749649 is a deficient number, since it is larger than the sum of its proper divisors (392815).

2749649 is an equidigital number, since it uses as much as digits as its factorization.

2749649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392814.

The product of its digits is 108864, while the sum is 41.

The square root of 2749649 is about 1658.2065613186. The cubic root of 2749649 is about 140.0960055773.

The spelling of 2749649 in words is "two million, seven hundred forty-nine thousand, six hundred forty-nine".