25969487 has 2 divisors, whose sum is σ = 25969488. Its totient is φ = 25969486.

The previous prime is 25969451. The next prime is 25969543. The reversal of 25969487 is 78496952.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25969487 - 2¹² = 25965391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25969987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12984743 + 12984744.

It is an arithmetic number, because the mean of its divisors is an integer number (12984744).

Almost surely, 2^25969487 is an apocalyptic number.

25969487 is a deficient number, since it is larger than the sum of its proper divisors (1).

25969487 is an equidigital number, since it uses as much as digits as its factorization.

25969487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 50.

The square root of 25969487 is about 5096.0265894126. The cubic root of 25969487 is about 296.1336709083.

The spelling of 25969487 in words is "twenty-five million, nine hundred sixty-nine thousand, four hundred eighty-seven".