25840469 has 2 divisors, whose sum is σ = 25840470. Its totient is φ = 25840468.

The previous prime is 25840429. The next prime is 25840471. The reversal of 25840469 is 96404852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18748900 + 7091569 = 4330^2 + 2663^2 .

It is a cyclic number.

It is not a de Polignac number, because 25840469 - 2¹⁶ = 25774933 is a prime.

It is a super-2 number, since 2×25840469² = 1335459676279922, which contains 22 as substring.

Together with 25840471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25840429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12920234 + 12920235.

It is an arithmetic number, because the mean of its divisors is an integer number (12920235).

Almost surely, 2^25840469 is an apocalyptic number.

It is an amenable number.

25840469 is a deficient number, since it is larger than the sum of its proper divisors (1).

25840469 is an equidigital number, since it uses as much as digits as its factorization.

25840469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 25840469 is about 5083.3521420417. The cubic root of 25840469 is about 295.6424531440.

The spelling of 25840469 in words is "twenty-five million, eight hundred forty thousand, four hundred sixty-nine".