25723823 has 4 divisors (see below), whose sum is σ = 26159880. Its totient is φ = 25287768.

The previous prime is 25723811. The next prime is 25723849. The reversal of 25723823 is 32832752.

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 25723823 - 2¹⁸ = 25461679 is a prime.

It is a super-4 number, since 4×25723823⁴ (a number of 31 digits) contains 4444 as substring.

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 25723823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25723123) 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, 217940 + ... + 218057.

It is an arithmetic number, because the mean of its divisors is an integer number (6539970).

Almost surely, 2^25723823 is an apocalyptic number.

25723823 is a deficient number, since it is larger than the sum of its proper divisors (436057).

25723823 is an equidigital number, since it uses as much as digits as its factorization.

25723823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436056.

The product of its digits is 20160, while the sum is 32.

The square root of 25723823 is about 5071.8658302443. The cubic root of 25723823 is about 295.1969306543.

The spelling of 25723823 in words is "twenty-five million, seven hundred twenty-three thousand, eight hundred twenty-three".