265905097 has 4 divisors (see below), whose sum is σ = 266308036. Its totient is φ = 265502160.

The previous prime is 265905083. The next prime is 265905103. The reversal of 265905097 is 790509562.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 790509562 = 2 ⋅395254781.

It can be written as a sum of positive squares in 2 ways, for example, as 207244816 + 58660281 = 14396^2 + 7659^2 .

It is a cyclic number.

It is not a de Polignac number, because 265905097 - 2²³ = 257516489 is a prime.

It is a super-2 number, since 2×265905097² = 141411041221158818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265905697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200478 + ... + 201799.

It is an arithmetic number, because the mean of its divisors is an integer number (66577009).

Almost surely, 2^265905097 is an apocalyptic number.

It is an amenable number.

265905097 is a deficient number, since it is larger than the sum of its proper divisors (402939).

265905097 is an equidigital number, since it uses as much as digits as its factorization.

265905097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402938.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 265905097 is about 16306.5967326110. The cubic root of 265905097 is about 643.0462659810.

The spelling of 265905097 in words is "two hundred sixty-five million, nine hundred five thousand, ninety-seven".