25612709 has 2 divisors, whose sum is σ = 25612710. Its totient is φ = 25612708.

The previous prime is 25612681. The next prime is 25612729. The reversal of 25612709 is 90721652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19624900 + 5987809 = 4430^2 + 2447^2 .

It is a cyclic number.

It is not a de Polignac number, because 25612709 - 2²⁴ = 8835493 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25612729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12806354 + 12806355.

It is an arithmetic number, because the mean of its divisors is an integer number (12806355).

Almost surely, 2^25612709 is an apocalyptic number.

It is an amenable number.

25612709 is a deficient number, since it is larger than the sum of its proper divisors (1).

25612709 is an equidigital number, since it uses as much as digits as its factorization.

25612709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 25612709 is about 5060.9000187714. The cubic root of 25612709 is about 294.7712830272.

The spelling of 25612709 in words is "twenty-five million, six hundred twelve thousand, seven hundred nine".