25775929 has 3 divisors (see below), whose sum is σ = 25781007. Its totient is φ = 25770852.

The previous prime is 25775917. The next prime is 25775947. The reversal of 25775929 is 92957752.

The square root of 25775929 is 5077.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 25050025 + 725904 = 5005^2 + 852^2 .

It is not a de Polignac number, because 25775929 - 2²¹ = 23678777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25775969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2539 + ... + 7615.

It is an arithmetic number, because the mean of its divisors is an integer number (8593669).

Almost surely, 2^25775929 is an apocalyptic number.

25775929 is the 5077-th square number.

25775929 is the 2539-th centered octagonal number.

It is an amenable number.

25775929 is a deficient number, since it is larger than the sum of its proper divisors (5078).

25775929 is an frugal number, since it uses more digits than its factorization.

25775929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10154 (or 5077 counting only the distinct ones).

The product of its digits is 396900, while the sum is 46.

The cubic root of 25775929 is about 295.3961125225.

Multiplying 25775929 by its product of digits (396900), we get a square (10230466220100 = 3198510²).

The spelling of 25775929 in words is "twenty-five million, seven hundred seventy-five thousand, nine hundred twenty-nine".