25378687 has 2 divisors, whose sum is σ = 25378688. Its totient is φ = 25378686.

The previous prime is 25378681. The next prime is 25378709. The reversal of 25378687 is 78687352.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25378687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25378681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12689343 + 12689344.

It is an arithmetic number, because the mean of its divisors is an integer number (12689344).

Almost surely, 2^25378687 is an apocalyptic number.

25378687 is a deficient number, since it is larger than the sum of its proper divisors (1).

25378687 is an equidigital number, since it uses as much as digits as its factorization.

25378687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 46.

The square root of 25378687 is about 5037.7263720849. The cubic root of 25378687 is about 293.8707647709.

The spelling of 25378687 in words is "twenty-five million, three hundred seventy-eight thousand, six hundred eighty-seven".