2431691 has 2 divisors, whose sum is σ = 2431692. Its totient is φ = 2431690.

The previous prime is 2431673. The next prime is 2431711. The reversal of 2431691 is 1961342.

2431691 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2431691 is a prime.

It is a super-2 number, since 2×2431691² = 11826242238962, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2431691.

It is not a weakly prime, because it can be changed into another prime (2431661) 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, 1215845 + 1215846.

It is an arithmetic number, because the mean of its divisors is an integer number (1215846).

2^2431691 is an apocalyptic number.

2431691 is a deficient number, since it is larger than the sum of its proper divisors (1).

2431691 is an equidigital number, since it uses as much as digits as its factorization.

2431691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 26.

The square root of 2431691 is about 1559.3880209877. The cubic root of 2431691 is about 134.4733205790.

The spelling of 2431691 in words is "two million, four hundred thirty-one thousand, six hundred ninety-one".