265672109 has 2 divisors, whose sum is σ = 265672110. Its totient is φ = 265672108.

The previous prime is 265672067. The next prime is 265672111. The reversal of 265672109 is 901276562.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194742025 + 70930084 = 13955^2 + 8422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265672109 is a prime.

Together with 265672111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265672159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132836054 + 132836055.

It is an arithmetic number, because the mean of its divisors is an integer number (132836055).

Almost surely, 2^265672109 is an apocalyptic number.

It is an amenable number.

265672109 is a deficient number, since it is larger than the sum of its proper divisors (1).

265672109 is an equidigital number, since it uses as much as digits as its factorization.

265672109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 265672109 is about 16299.4511870799. The cubic root of 265672109 is about 642.8583971451.

The spelling of 265672109 in words is "two hundred sixty-five million, six hundred seventy-two thousand, one hundred nine".