842872831 has 2 divisors, whose sum is σ = 842872832. Its totient is φ = 842872830.

The previous prime is 842872759. The next prime is 842872853. The reversal of 842872831 is 138278248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 842872831 - 2¹¹ = 842870783 is a prime.

It is a super-2 number, since 2×842872831² = 1420869218475909122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842872861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421436415 + 421436416.

It is an arithmetic number, because the mean of its divisors is an integer number (421436416).

Almost surely, 2^842872831 is an apocalyptic number.

842872831 is a deficient number, since it is larger than the sum of its proper divisors (1).

842872831 is an equidigital number, since it uses as much as digits as its factorization.

842872831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172032, while the sum is 43.

The square root of 842872831 is about 29032.2722328102. The cubic root of 842872831 is about 944.6132179730.

The spelling of 842872831 in words is "eight hundred forty-two million, eight hundred seventy-two thousand, eight hundred thirty-one".