25312687 has 2 divisors, whose sum is σ = 25312688. Its totient is φ = 25312686.

The previous prime is 25312613. The next prime is 25312697. The reversal of 25312687 is 78621352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25312687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25312697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12656343 + 12656344.

It is an arithmetic number, because the mean of its divisors is an integer number (12656344).

Almost surely, 2^25312687 is an apocalyptic number.

25312687 is a deficient number, since it is larger than the sum of its proper divisors (1).

25312687 is an equidigital number, since it uses as much as digits as its factorization.

25312687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 25312687 is about 5031.1715335496. The cubic root of 25312687 is about 293.6157961281.

The spelling of 25312687 in words is "twenty-five million, three hundred twelve thousand, six hundred eighty-seven".