840803231 has 4 divisors (see below), whose sum is σ = 842475312. Its totient is φ = 839131152.

The previous prime is 840803191. The next prime is 840803263. The reversal of 840803231 is 132308048.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840803231 is a prime.

It is a super-2 number, since 2×840803231² = 1413900146520078722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840803194 and 840803203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840803531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 835286 + ... + 836291.

It is an arithmetic number, because the mean of its divisors is an integer number (210618828).

Almost surely, 2^840803231 is an apocalyptic number.

840803231 is a deficient number, since it is larger than the sum of its proper divisors (1672081).

840803231 is a wasteful number, since it uses less digits than its factorization.

840803231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672080.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 840803231 is about 28996.6072325712. The cubic root of 840803231 is about 943.8394461310.

The spelling of 840803231 in words is "eight hundred forty million, eight hundred three thousand, two hundred thirty-one".