25949633 has 4 divisors (see below), whose sum is σ = 27476100. Its totient is φ = 24423168.

The previous prime is 25949621. The next prime is 25949639. The reversal of 25949633 is 33694952.

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 16265089 + 9684544 = 4033^2 + 3112^2 .

It is a cyclic number.

It is not a de Polignac number, because 25949633 - 2¹⁰ = 25948609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25949639) 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, 763208 + ... + 763241.

It is an arithmetic number, because the mean of its divisors is an integer number (6869025).

Almost surely, 2^25949633 is an apocalyptic number.

It is an amenable number.

25949633 is a deficient number, since it is larger than the sum of its proper divisors (1526467).

25949633 is a wasteful number, since it uses less digits than its factorization.

25949633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526466.

The product of its digits is 174960, while the sum is 41.

The square root of 25949633 is about 5094.0782286887. The cubic root of 25949633 is about 296.0581856944.

The spelling of 25949633 in words is "twenty-five million, nine hundred forty-nine thousand, six hundred thirty-three".