25698769 has 2 divisors, whose sum is σ = 25698770. Its totient is φ = 25698768.

The previous prime is 25698767. The next prime is 25698817. The reversal of 25698769 is 96789652.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22043025 + 3655744 = 4695^2 + 1912^2 .

It is a cyclic number.

It is not a de Polignac number, because 25698769 - 2¹ = 25698767 is a prime.

It is a super-2 number, since 2×25698769² = 1320853456230722, which contains 22 as substring.

Together with 25698767, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (25698763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12849384 + 12849385.

It is an arithmetic number, because the mean of its divisors is an integer number (12849385).

Almost surely, 2^25698769 is an apocalyptic number.

It is an amenable number.

25698769 is a deficient number, since it is larger than the sum of its proper divisors (1).

25698769 is an equidigital number, since it uses as much as digits as its factorization.

25698769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 52.

The square root of 25698769 is about 5069.3953288336. The cubic root of 25698769 is about 295.1010627592.

The spelling of 25698769 in words is "twenty-five million, six hundred ninety-eight thousand, seven hundred sixty-nine".