265894997 has 4 divisors (see below), whose sum is σ = 275063820. Its totient is φ = 256726176.

The previous prime is 265894991. The next prime is 265895009. The reversal of 265894997 is 799498562.

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 229037956 + 36857041 = 15134^2 + 6071^2 .

It is a cyclic number.

It is not a de Polignac number, because 265894997 - 2¹² = 265890901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265894991) 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, 4584368 + ... + 4584425.

It is an arithmetic number, because the mean of its divisors is an integer number (68765955).

Almost surely, 2^265894997 is an apocalyptic number.

It is an amenable number.

265894997 is a deficient number, since it is larger than the sum of its proper divisors (9168823).

265894997 is an equidigital number, since it uses as much as digits as its factorization.

265894997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9168822.

The product of its digits is 9797760, while the sum is 59.

The square root of 265894997 is about 16306.2870390534. The cubic root of 265894997 is about 643.0381241671.

The spelling of 265894997 in words is "two hundred sixty-five million, eight hundred ninety-four thousand, nine hundred ninety-seven".