855840269 has 4 divisors (see below), whose sum is σ = 856259196. Its totient is φ = 855421344.

The previous prime is 855840263. The next prime is 855840283. The reversal of 855840269 is 962048558.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 962048558 = 2 ⋅481024279.

It can be written as a sum of positive squares in 2 ways, for example, as 347337769 + 508502500 = 18637^2 + 22550^2 .

It is a cyclic number.

It is not a de Polignac number, because 855840269 - 2²⁴ = 839063053 is a prime.

It is a super-2 number, since 2×855840269² = 1464925132083984722, 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 (855840263) 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, 206384 + ... + 210489.

It is an arithmetic number, because the mean of its divisors is an integer number (214064799).

Almost surely, 2^855840269 is an apocalyptic number.

It is an amenable number.

855840269 is a deficient number, since it is larger than the sum of its proper divisors (418927).

855840269 is a wasteful number, since it uses less digits than its factorization.

855840269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418926.

The product of its (nonzero) digits is 691200, while the sum is 47.

The square root of 855840269 is about 29254.7478027072. The cubic root of 855840269 is about 949.4328171182.

The spelling of 855840269 in words is "eight hundred fifty-five million, eight hundred forty thousand, two hundred sixty-nine".