265400697 has 4 divisors (see below), whose sum is σ = 353867600. Its totient is φ = 176933796.

The previous prime is 265400693. The next prime is 265400711. The reversal of 265400697 is 796004562.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 265400697 - 2² = 265400693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265400693) 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, 44233447 + ... + 44233452.

It is an arithmetic number, because the mean of its divisors is an integer number (88466900).

Almost surely, 2^265400697 is an apocalyptic number.

It is an amenable number.

265400697 is a deficient number, since it is larger than the sum of its proper divisors (88466903).

265400697 is an equidigital number, since it uses as much as digits as its factorization.

265400697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88466902.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 265400697 is about 16291.1232577745. The cubic root of 265400697 is about 642.6394067336.

The spelling of 265400697 in words is "two hundred sixty-five million, four hundred thousand, six hundred ninety-seven".