25646893 has 2 divisors, whose sum is σ = 25646894. Its totient is φ = 25646892.

The previous prime is 25646869. The next prime is 25646911. The reversal of 25646893 is 39864652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25220484 + 426409 = 5022^2 + 653^2 .

It is a cyclic number.

It is not a de Polignac number, because 25646893 - 2⁵ = 25646861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25646843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12823446 + 12823447.

It is an arithmetic number, because the mean of its divisors is an integer number (12823447).

Almost surely, 2^25646893 is an apocalyptic number.

It is an amenable number.

25646893 is a deficient number, since it is larger than the sum of its proper divisors (1).

25646893 is an equidigital number, since it uses as much as digits as its factorization.

25646893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 43.

The square root of 25646893 is about 5064.2761575570. The cubic root of 25646893 is about 294.9023635520.

The spelling of 25646893 in words is "twenty-five million, six hundred forty-six thousand, eight hundred ninety-three".