25690447 has 2 divisors, whose sum is σ = 25690448. Its totient is φ = 25690446.

The previous prime is 25690439. The next prime is 25690459. The reversal of 25690447 is 74409652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25690447 - 2³ = 25690439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25690487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12845223 + 12845224.

It is an arithmetic number, because the mean of its divisors is an integer number (12845224).

Almost surely, 2^25690447 is an apocalyptic number.

25690447 is a deficient number, since it is larger than the sum of its proper divisors (1).

25690447 is an equidigital number, since it uses as much as digits as its factorization.

25690447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 25690447 is about 5068.5744544201. The cubic root of 25690447 is about 295.0692052517.

The spelling of 25690447 in words is "twenty-five million, six hundred ninety thousand, four hundred forty-seven".