2491949 has 2 divisors, whose sum is σ = 2491950. Its totient is φ = 2491948.

The previous prime is 2491933. The next prime is 2491961. The reversal of 2491949 is 9491942.

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., 2271049 + 220900 = 1507^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 2491949 - 2⁴ = 2491933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2491649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245974 + 1245975.

It is an arithmetic number, because the mean of its divisors is an integer number (1245975).

2^2491949 is an apocalyptic number.

It is an amenable number.

2491949 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491949 is an equidigital number, since it uses as much as digits as its factorization.

2491949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 2491949 is about 1578.5908272887. The cubic root of 2491949 is about 135.5750323125.

The spelling of 2491949 in words is "two million, four hundred ninety-one thousand, nine hundred forty-nine".