265447997 has 2 divisors, whose sum is σ = 265447998. Its totient is φ = 265447996.

The previous prime is 265447967. The next prime is 265447999. The reversal of 265447997 is 799744562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176730436 + 88717561 = 13294^2 + 9419^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265447997 is a prime.

It is a super-2 number, since 2×265447997² = 140925278222624018, which contains 22 as substring.

Together with 265447999, 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 (265447999) 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 as a sum of consecutive naturals, namely, 132723998 + 132723999.

It is an arithmetic number, because the mean of its divisors is an integer number (132723999).

Almost surely, 2^265447997 is an apocalyptic number.

It is an amenable number.

265447997 is a deficient number, since it is larger than the sum of its proper divisors (1).

265447997 is an equidigital number, since it uses as much as digits as its factorization.

265447997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 53.

The square root of 265447997 is about 16292.5749039248. The cubic root of 265447997 is about 642.6775817631.

The spelling of 265447997 in words is "two hundred sixty-five million, four hundred forty-seven thousand, nine hundred ninety-seven".