25693889 has 4 divisors (see below), whose sum is σ = 27670356. Its totient is φ = 23717424.

The previous prime is 25693867. The next prime is 25693901. The reversal of 25693889 is 98839652.

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 7246864 + 18447025 = 2692^2 + 4295^2 .

It is a cyclic number.

It is not a de Polignac number, because 25693889 - 2²⁴ = 8916673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25699889) 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, 988214 + ... + 988239.

It is an arithmetic number, because the mean of its divisors is an integer number (6917589).

Almost surely, 2^25693889 is an apocalyptic number.

It is an amenable number.

25693889 is a deficient number, since it is larger than the sum of its proper divisors (1976467).

25693889 is a wasteful number, since it uses less digits than its factorization.

25693889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976466.

The product of its digits is 933120, while the sum is 50.

The square root of 25693889 is about 5068.9139862499. The cubic root of 25693889 is about 295.0823824306.

It can be divided in two parts, 25 and 693889, that multiplied together give a square (17347225 = 4165²).

The spelling of 25693889 in words is "twenty-five million, six hundred ninety-three thousand, eight hundred eighty-nine".