25535869 has 2 divisors, whose sum is σ = 25535870. Its totient is φ = 25535868.

The previous prime is 25535857. The next prime is 25535891. The reversal of 25535869 is 96853552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18164644 + 7371225 = 4262^2 + 2715^2 .

It is a cyclic number.

It is not a de Polignac number, because 25535869 - 2⁹ = 25535357 is a prime.

It is a super-2 number, since 2×25535869² = 1304161211170322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25535269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12767934 + 12767935.

It is an arithmetic number, because the mean of its divisors is an integer number (12767935).

Almost surely, 2^25535869 is an apocalyptic number.

It is an amenable number.

25535869 is a deficient number, since it is larger than the sum of its proper divisors (1).

25535869 is an equidigital number, since it uses as much as digits as its factorization.

25535869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 43.

The square root of 25535869 is about 5053.3027813500. The cubic root of 25535869 is about 294.4762092809.

The spelling of 25535869 in words is "twenty-five million, five hundred thirty-five thousand, eight hundred sixty-nine".