25648673 has 4 divisors (see below), whose sum is σ = 26533140. Its totient is φ = 24764208.

The previous prime is 25648669. The next prime is 25648691. The reversal of 25648673 is 37684652.

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 9784384 + 15864289 = 3128^2 + 3983^2 .

It is a cyclic number.

It is not a de Polignac number, because 25648673 - 2² = 25648669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25648673.

It is not an unprimeable number, because it can be changed into a prime (25648603) 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, 442190 + ... + 442247.

It is an arithmetic number, because the mean of its divisors is an integer number (6633285).

Almost surely, 2^25648673 is an apocalyptic number.

It is an amenable number.

25648673 is a deficient number, since it is larger than the sum of its proper divisors (884467).

25648673 is an equidigital number, since it uses as much as digits as its factorization.

25648673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884466.

The product of its digits is 241920, while the sum is 41.

The square root of 25648673 is about 5064.4518953190. The cubic root of 25648673 is about 294.9091858737.

The spelling of 25648673 in words is "twenty-five million, six hundred forty-eight thousand, six hundred seventy-three".