25991063 has 8 divisors (see below), whose sum is σ = 30191520. Its totient is φ = 21912480.

The previous prime is 25991039. The next prime is 25991071. The reversal of 25991063 is 36019952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25991063 - 2¹² = 25986967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25991023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30008 + ... + 30861.

It is an arithmetic number, because the mean of its divisors is an integer number (3773940).

Almost surely, 2^25991063 is an apocalyptic number.

25991063 is a deficient number, since it is larger than the sum of its proper divisors (4200457).

25991063 is an equidigital number, since it uses as much as digits as its factorization.

25991063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60937.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 25991063 is about 5098.1430933233. The cubic root of 25991063 is about 296.2156595825.

The spelling of 25991063 in words is "twenty-five million, nine hundred ninety-one thousand, sixty-three".