2491847 has 2 divisors, whose sum is σ = 2491848. Its totient is φ = 2491846.

The previous prime is 2491837. The next prime is 2491861. The reversal of 2491847 is 7481942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2491847 - 2²⁰ = 1443271 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2491837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1245923 + 1245924.

It is an arithmetic number, because the mean of its divisors is an integer number (1245924).

2^2491847 is an apocalyptic number.

2491847 is a deficient number, since it is larger than the sum of its proper divisors (1).

2491847 is an equidigital number, since it uses as much as digits as its factorization.

2491847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 35.

The square root of 2491847 is about 1578.5585196628. The cubic root of 2491847 is about 135.5731825098.

The spelling of 2491847 in words is "two million, four hundred ninety-one thousand, eight hundred forty-seven".