253456769 has 4 divisors (see below), whose sum is σ = 257611860. Its totient is φ = 249301680.

The previous prime is 253456747. The next prime is 253456811. The reversal of 253456769 is 967654352.

253456769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 118548544 + 134908225 = 10888^2 + 11615^2 .

It is a cyclic number.

It is not a de Polignac number, because 253456769 - 2²⁰ = 252408193 is a prime.

It is a super-2 number, since 2×253456769² = 128480667503838722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (253456739) 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, 2077454 + ... + 2077575.

It is an arithmetic number, because the mean of its divisors is an integer number (64402965).

Almost surely, 2^253456769 is an apocalyptic number.

It is an amenable number.

253456769 is a deficient number, since it is larger than the sum of its proper divisors (4155091).

253456769 is an equidigital number, since it uses as much as digits as its factorization.

253456769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4155090.

The product of its digits is 1360800, while the sum is 47.

The square root of 253456769 is about 15920.3256562170. The cubic root of 253456769 is about 632.8507485034.

The spelling of 253456769 in words is "two hundred fifty-three million, four hundred fifty-six thousand, seven hundred sixty-nine".