265340623 has 4 divisors (see below), whose sum is σ = 265387240. Its totient is φ = 265294008.

The previous prime is 265340557. The next prime is 265340629. The reversal of 265340623 is 326043562.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 265340623 - 2¹⁷ = 265209551 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 (265340629) 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, 13353 + ... + 26626.

It is an arithmetic number, because the mean of its divisors is an integer number (66346810).

Almost surely, 2^265340623 is an apocalyptic number.

265340623 is a deficient number, since it is larger than the sum of its proper divisors (46617).

265340623 is an equidigital number, since it uses as much as digits as its factorization.

265340623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46616.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 265340623 is about 16289.2793886040. The cubic root of 265340623 is about 642.5909154858.

The spelling of 265340623 in words is "two hundred sixty-five million, three hundred forty thousand, six hundred twenty-three".