25993129 has 4 divisors (see below), whose sum is σ = 26695684. Its totient is φ = 25290576.

The previous prime is 25993111. The next prime is 25993157. The reversal of 25993129 is 92139952.

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 14784025 + 11209104 = 3845^2 + 3348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25993129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25993091 and 25993100.

It is not an unprimeable number, because it can be changed into a prime (25993529) 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, 351222 + ... + 351295.

It is an arithmetic number, because the mean of its divisors is an integer number (6673921).

Almost surely, 2^25993129 is an apocalyptic number.

It is an amenable number.

25993129 is a deficient number, since it is larger than the sum of its proper divisors (702555).

25993129 is an equidigital number, since it uses as much as digits as its factorization.

25993129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702554.

The product of its digits is 43740, while the sum is 40.

The square root of 25993129 is about 5098.3457120913. The cubic root of 25993129 is about 296.2235079897.

The spelling of 25993129 in words is "twenty-five million, nine hundred ninety-three thousand, one hundred twenty-nine".