25690263 has 4 divisors (see below), whose sum is σ = 34253688. Its totient is φ = 17126840.

The previous prime is 25690229. The next prime is 25690277. The reversal of 25690263 is 36209652.

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 25690263 - 2⁶ = 25690199 is a prime.

It is a super-2 number, since 2×25690263² = 1319979226018338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25690463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4281708 + ... + 4281713.

It is an arithmetic number, because the mean of its divisors is an integer number (8563422).

Almost surely, 2^25690263 is an apocalyptic number.

25690263 is a deficient number, since it is larger than the sum of its proper divisors (8563425).

25690263 is an equidigital number, since it uses as much as digits as its factorization.

25690263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563424.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 25690263 is about 5068.5563033274. The cubic root of 25690263 is about 295.0685008022.

The spelling of 25690263 in words is "twenty-five million, six hundred ninety thousand, two hundred sixty-three".