25349791 has 4 divisors (see below), whose sum is σ = 25419232. Its totient is φ = 25280352.

The previous prime is 25349759. The next prime is 25349809. The reversal of 25349791 is 19794352.

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 25349791 - 2⁵ = 25349759 is a prime.

It is a super-2 number, since 2×25349791² = 1285223807487362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25349491) 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, 34170 + ... + 34903.

It is an arithmetic number, because the mean of its divisors is an integer number (6354808).

Almost surely, 2^25349791 is an apocalyptic number.

25349791 is a deficient number, since it is larger than the sum of its proper divisors (69441).

25349791 is an equidigital number, since it uses as much as digits as its factorization.

25349791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69440.

The product of its digits is 68040, while the sum is 40.

The square root of 25349791 is about 5034.8575948084. The cubic root of 25349791 is about 293.7591893308.

The spelling of 25349791 in words is "twenty-five million, three hundred forty-nine thousand, seven hundred ninety-one".