25690117 has 4 divisors (see below), whose sum is σ = 25978860. Its totient is φ = 25401376.

The previous prime is 25690097. The next prime is 25690121. The reversal of 25690117 is 71109652.

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 1865956 + 23824161 = 1366^2 + 4881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25690117 is a prime.

It is a super-2 number, since 2×25690117² = 1319964222947378, 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 (25690177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144238 + ... + 144415.

It is an arithmetic number, because the mean of its divisors is an integer number (6494715).

Almost surely, 2^25690117 is an apocalyptic number.

It is an amenable number.

25690117 is a deficient number, since it is larger than the sum of its proper divisors (288743).

25690117 is an equidigital number, since it uses as much as digits as its factorization.

25690117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288742.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 25690117 is about 5068.5419007837. The cubic root of 25690117 is about 295.0679418345.

Adding to 25690117 its reverse (71109652), we get a palindrome (96799769).

The spelling of 25690117 in words is "twenty-five million, six hundred ninety thousand, one hundred seventeen".