25387619 has 2 divisors, whose sum is σ = 25387620. Its totient is φ = 25387618.

The previous prime is 25387601. The next prime is 25387631. The reversal of 25387619 is 91678352.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25387619 - 2²⁴ = 8610403 is a prime.

It is a super-2 number, since 2×25387619² = 1289062396978322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25387319) 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, 12693809 + 12693810.

It is an arithmetic number, because the mean of its divisors is an integer number (12693810).

Almost surely, 2^25387619 is an apocalyptic number.

25387619 is a deficient number, since it is larger than the sum of its proper divisors (1).

25387619 is an equidigital number, since it uses as much as digits as its factorization.

25387619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 25387619 is about 5038.6128051280. The cubic root of 25387619 is about 293.9052365542.

The spelling of 25387619 in words is "twenty-five million, three hundred eighty-seven thousand, six hundred nineteen".