263420869 has 4 divisors (see below), whose sum is σ = 263645100. Its totient is φ = 263196640.

The previous prime is 263420851. The next prime is 263420879. The reversal of 263420869 is 968024362.

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 228161025 + 35259844 = 15105^2 + 5938^2 .

It is a cyclic number.

It is not a de Polignac number, because 263420869 - 2²⁵ = 229866437 is a prime.

It is a super-2 number, since 2×263420869² = 138781108449430322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263420809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110344 + ... + 112705.

It is an arithmetic number, because the mean of its divisors is an integer number (65911275).

Almost surely, 2^263420869 is an apocalyptic number.

It is an amenable number.

263420869 is a deficient number, since it is larger than the sum of its proper divisors (224231).

263420869 is a wasteful number, since it uses less digits than its factorization.

263420869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224230.

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 263420869 is about 16230.2455002997. The cubic root of 263420869 is about 641.0374360662.

The spelling of 263420869 in words is "two hundred sixty-three million, four hundred twenty thousand, eight hundred sixty-nine".