2491837 has 2 divisors, whose sum is σ = 2491838. Its totient is φ = 2491836.

The previous prime is 2491829. The next prime is 2491847. The reversal of 2491837 is 7381942.

2491837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1692601 + 799236 = 1301^2 + 894^2 .

It is a cyclic number.

It is not a de Polignac number, because 2491837 - 2³ = 2491829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2491847) 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, 1245918 + 1245919.

It is an arithmetic number, because the mean of its divisors is an integer number (1245919).

2^2491837 is an apocalyptic number.

It is an amenable number.

2491837 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491837 is an equidigital number, since it uses as much as digits as its factorization.

2491837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 2491837 is about 1578.5553522129. Note that the first 3 decimals coincide. The cubic root of 2491837 is about 135.5730011538.

The spelling of 2491837 in words is "two million, four hundred ninety-one thousand, eight hundred thirty-seven".