25705623 has 4 divisors (see below), whose sum is σ = 34274168. Its totient is φ = 17137080.

The previous prime is 25705609. The next prime is 25705627. The reversal of 25705623 is 32650752.

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

It is not a de Polignac number, because 25705623 - 2⁵ = 25705591 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 (25705627) 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, 4284268 + ... + 4284273.

It is an arithmetic number, because the mean of its divisors is an integer number (8568542).

Almost surely, 2^25705623 is an apocalyptic number.

25705623 is a deficient number, since it is larger than the sum of its proper divisors (8568545).

25705623 is an equidigital number, since it uses as much as digits as its factorization.

25705623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8568544.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 25705623 is about 5070.0713012738. The cubic root of 25705623 is about 295.1272954411.

The spelling of 25705623 in words is "twenty-five million, seven hundred five thousand, six hundred twenty-three".