25500493 has 6 divisors (see below), whose sum is σ = 27089066. Its totient is φ = 24000192.

The previous prime is 25500487. The next prime is 25500509. The reversal of 25500493 is 39400552.

It can be written as a sum of positive squares in 3 ways, for example, as 9162729 + 16337764 = 3027^2 + 4042^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25500493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 43830 + ... + 44407.

Almost surely, 2^25500493 is an apocalyptic number.

It is an amenable number.

25500493 is a deficient number, since it is larger than the sum of its proper divisors (1588573).

25500493 is an equidigital number, since it uses as much as digits as its factorization.

25500493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88271 (or 88254 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 25500493 is about 5049.8012832190. The cubic root of 25500493 is about 294.3401626785.

The spelling of 25500493 in words is "twenty-five million, five hundred thousand, four hundred ninety-three".