2901649 has 2 divisors, whose sum is σ = 2901650. Its totient is φ = 2901648.

The previous prime is 2901643. The next prime is 2901707. The reversal of 2901649 is 9461092.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1871424 + 1030225 = 1368^2 + 1015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2901649 - 2⁵ = 2901617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2901649.

It is not a weakly prime, because it can be changed into another prime (2901643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1450824 + 1450825.

It is an arithmetic number, because the mean of its divisors is an integer number (1450825).

2^2901649 is an apocalyptic number.

It is an amenable number.

2901649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2901649 is an equidigital number, since it uses as much as digits as its factorization.

2901649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 2901649 is about 1703.4227308569. The cubic root of 2901649 is about 142.6313388473.

The spelling of 2901649 in words is "two million, nine hundred one thousand, six hundred forty-nine".