840841269 has 4 divisors (see below), whose sum is σ = 1121121696. Its totient is φ = 560560844.

The previous prime is 840841259. The next prime is 840841271. The reversal of 840841269 is 962148048.

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 a cyclic number.

It is not a de Polignac number, because 840841269 - 2⁸ = 840841013 is a prime.

It is a super-2 number, since 2×840841269² = 1414028079307060722, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 840841269.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840841259) 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, 140140209 + ... + 140140214.

It is an arithmetic number, because the mean of its divisors is an integer number (280280424).

Almost surely, 2^840841269 is an apocalyptic number.

It is an amenable number.

840841269 is a deficient number, since it is larger than the sum of its proper divisors (280280427).

840841269 is a wasteful number, since it uses less digits than its factorization.

840841269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280280426.

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 840841269 is about 28997.2631294748. The cubic root of 840841269 is about 943.8536790383.

The spelling of 840841269 in words is "eight hundred forty million, eight hundred forty-one thousand, two hundred sixty-nine".