2493691 has 4 divisors (see below), whose sum is σ = 2521800. Its totient is φ = 2465584.

The previous prime is 2493653. The next prime is 2493707. The reversal of 2493691 is 1963942.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2493691 - 2⁷ = 2493563 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2493991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13921 + ... + 14098.

It is an arithmetic number, because the mean of its divisors is an integer number (630450).

2^2493691 is an apocalyptic number.

2493691 is a deficient number, since it is larger than the sum of its proper divisors (28109).

2493691 is an equidigital number, since it uses as much as digits as its factorization.

2493691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28108.

The product of its digits is 11664, while the sum is 34.

The square root of 2493691 is about 1579.1424888211. The cubic root of 2493691 is about 135.6066162515.

The spelling of 2493691 in words is "two million, four hundred ninety-three thousand, six hundred ninety-one".