839869231 has 4 divisors (see below), whose sum is σ = 839979432. Its totient is φ = 839759032.

The previous prime is 839869229. The next prime is 839869243. The reversal of 839869231 is 132968938.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132968938 = 2 ⋅66484469.

It is a cyclic number.

It is not a de Polignac number, because 839869231 - 2¹ = 839869229 is a prime.

It is a super-2 number, since 2×839869231² = 1410760650361062722, 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 (839869291) 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, 42745 + ... + 59218.

It is an arithmetic number, because the mean of its divisors is an integer number (209994858).

Almost surely, 2^839869231 is an apocalyptic number.

839869231 is a deficient number, since it is larger than the sum of its proper divisors (110201).

839869231 is a wasteful number, since it uses less digits than its factorization.

839869231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110200.

The product of its digits is 559872, while the sum is 49.

The square root of 839869231 is about 28980.4974249926. The cubic root of 839869231 is about 943.4898309728.

The spelling of 839869231 in words is "eight hundred thirty-nine million, eight hundred sixty-nine thousand, two hundred thirty-one".