25139663 has 2 divisors, whose sum is σ = 25139664. Its totient is φ = 25139662.

The previous prime is 25139659. The next prime is 25139711. The reversal of 25139663 is 36693152.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25139663 - 2² = 25139659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25139263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12569831 + 12569832.

It is an arithmetic number, because the mean of its divisors is an integer number (12569832).

Almost surely, 2^25139663 is an apocalyptic number.

25139663 is a deficient number, since it is larger than the sum of its proper divisors (1).

25139663 is an equidigital number, since it uses as much as digits as its factorization.

25139663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 35.

The square root of 25139663 is about 5013.9468485416. The cubic root of 25139663 is about 292.9452657838.

The spelling of 25139663 in words is "twenty-five million, one hundred thirty-nine thousand, six hundred sixty-three".