2493991 has 2 divisors, whose sum is σ = 2493992. Its totient is φ = 2493990.

The previous prime is 2493983. The next prime is 2494031. The reversal of 2493991 is 1993942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2493991 - 2³ = 2493983 is a prime.

It is a super-2 number, since 2×2493991² = 12439982216162, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2493991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2494991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1246995 + 1246996.

It is an arithmetic number, because the mean of its divisors is an integer number (1246996).

2^2493991 is an apocalyptic number.

2493991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2493991 is an equidigital number, since it uses as much as digits as its factorization.

2493991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 2493991 is about 1579.2374742261. The cubic root of 2493991 is about 135.6120540214.

The spelling of 2493991 in words is "two million, four hundred ninety-three thousand, nine hundred ninety-one".