850239931 has 2 divisors, whose sum is σ = 850239932. Its totient is φ = 850239930.

The previous prime is 850239913. The next prime is 850239953. The reversal of 850239931 is 139932058.

Together with previous prime (850239913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-850239931 is a prime.

It is a super-2 number, since 2×850239931² = 1445815880533769522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (850239961) 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 as a sum of consecutive naturals, namely, 425119965 + 425119966.

It is an arithmetic number, because the mean of its divisors is an integer number (425119966).

Almost surely, 2^850239931 is an apocalyptic number.

850239931 is a deficient number, since it is larger than the sum of its proper divisors (1).

850239931 is an equidigital number, since it uses as much as digits as its factorization.

850239931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 850239931 is about 29158.8739665989. The cubic root of 850239931 is about 947.3573578267.

The spelling of 850239931 in words is "eight hundred fifty million, two hundred thirty-nine thousand, nine hundred thirty-one".