25716493 has 12 divisors (see below), whose sum is σ = 28404544. Its totient is φ = 23265000.

The previous prime is 25716463. The next prime is 25716499. The reversal of 25716493 is 39461752.

It is a de Polignac number, because none of the positive numbers 2^k-25716493 is a prime.

It is a super-2 number, since 2×25716493² = 1322676024438098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25716499) 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 in 11 ways as a sum of consecutive naturals, for example, 33868 + ... + 34618.

Almost surely, 2^25716493 is an apocalyptic number.

It is an amenable number.

25716493 is a deficient number, since it is larger than the sum of its proper divisors (2688051).

25716493 is a wasteful number, since it uses less digits than its factorization.

25716493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1045 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 25716493 is about 5071.1431650073. The cubic root of 25716493 is about 295.1688892151.

The spelling of 25716493 in words is "twenty-five million, seven hundred sixteen thousand, four hundred ninety-three".