25403863 has 4 divisors (see below), whose sum is σ = 25427880. Its totient is φ = 25379848.

The previous prime is 25403857. The next prime is 25403897. The reversal of 25403863 is 36830452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25403863 - 2⁹ = 25403351 is a prime.

It is a super-3 number, since 3×25403863³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25403803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10345 + ... + 12562.

It is an arithmetic number, because the mean of its divisors is an integer number (6356970).

Almost surely, 2^25403863 is an apocalyptic number.

25403863 is a deficient number, since it is larger than the sum of its proper divisors (24017).

25403863 is a wasteful number, since it uses less digits than its factorization.

25403863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24016.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 25403863 is about 5040.2244989683. The cubic root of 25403863 is about 293.9679072440.

The spelling of 25403863 in words is "twenty-five million, four hundred three thousand, eight hundred sixty-three".