25591469 has 2 divisors, whose sum is σ = 25591470. Its totient is φ = 25591468.

The previous prime is 25591459. The next prime is 25591507. The reversal of 25591469 is 96419552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16362025 + 9229444 = 4045^2 + 3038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25591469 is a prime.

It is a super-2 number, since 2×25591469² = 1309846571155922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25591459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12795734 + 12795735.

It is an arithmetic number, because the mean of its divisors is an integer number (12795735).

Almost surely, 2^25591469 is an apocalyptic number.

It is an amenable number.

25591469 is a deficient number, since it is larger than the sum of its proper divisors (1).

25591469 is an equidigital number, since it uses as much as digits as its factorization.

25591469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 41.

The square root of 25591469 is about 5058.8011425633. The cubic root of 25591469 is about 294.6897782616.

The spelling of 25591469 in words is "twenty-five million, five hundred ninety-one thousand, four hundred sixty-nine".