2869649 has 2 divisors, whose sum is σ = 2869650. Its totient is φ = 2869648.

The previous prime is 2869621. The next prime is 2869663. The reversal of 2869649 is 9469682.

2869649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2050624 + 819025 = 1432^2 + 905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2869649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2869249) 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, 1434824 + 1434825.

It is an arithmetic number, because the mean of its divisors is an integer number (1434825).

2^2869649 is an apocalyptic number.

It is an amenable number.

2869649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2869649 is an equidigital number, since it uses as much as digits as its factorization.

2869649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 44.

The square root of 2869649 is about 1694.0038370677. The cubic root of 2869649 is about 142.1050766272.

The spelling of 2869649 in words is "two million, eight hundred sixty-nine thousand, six hundred forty-nine".