265798399 has 4 divisors (see below), whose sum is σ = 265839336. Its totient is φ = 265757464.

The previous prime is 265798381. The next prime is 265798409. The reversal of 265798399 is 993897562.

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 265798399 - 2⁷ = 265798271 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 (265798199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8329 + ... + 24514.

It is an arithmetic number, because the mean of its divisors is an integer number (66459834).

Almost surely, 2^265798399 is an apocalyptic number.

265798399 is a deficient number, since it is larger than the sum of its proper divisors (40937).

265798399 is an equidigital number, since it uses as much as digits as its factorization.

265798399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40936.

The product of its digits is 7348320, while the sum is 58.

The square root of 265798399 is about 16303.3247836139. The cubic root of 265798399 is about 642.9602441504.

The spelling of 265798399 in words is "two hundred sixty-five million, seven hundred ninety-eight thousand, three hundred ninety-nine".