25327997 has 4 divisors (see below), whose sum is σ = 25375356. Its totient is φ = 25280640.

The previous prime is 25327987. The next prime is 25327999. The reversal of 25327997 is 79972352.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14661241 + 10666756 = 3829^2 + 3266^2 .

It is a cyclic number.

It is not a de Polignac number, because 25327997 - 2¹² = 25323901 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 (25327999) 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, 22868 + ... + 23949.

It is an arithmetic number, because the mean of its divisors is an integer number (6343839).

Almost surely, 2^25327997 is an apocalyptic number.

It is an amenable number.

25327997 is a deficient number, since it is larger than the sum of its proper divisors (47359).

25327997 is an equidigital number, since it uses as much as digits as its factorization.

25327997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47358.

The product of its digits is 238140, while the sum is 44.

The square root of 25327997 is about 5032.6928179653. The cubic root of 25327997 is about 293.6749805712.

The spelling of 25327997 in words is "twenty-five million, three hundred twenty-seven thousand, nine hundred ninety-seven".