849407971 has 2 divisors, whose sum is σ = 849407972. Its totient is φ = 849407970.

The previous prime is 849407969. The next prime is 849407983. The reversal of 849407971 is 179704948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 849407971 - 2¹ = 849407969 is a prime.

Together with 849407969, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (849402971) 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, 424703985 + 424703986.

It is an arithmetic number, because the mean of its divisors is an integer number (424703986).

Almost surely, 2^849407971 is an apocalyptic number.

849407971 is a deficient number, since it is larger than the sum of its proper divisors (1).

849407971 is an equidigital number, since it uses as much as digits as its factorization.

849407971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 508032, while the sum is 49.

The square root of 849407971 is about 29144.6044920840. The cubic root of 849407971 is about 947.0482605114.

The spelling of 849407971 in words is "eight hundred forty-nine million, four hundred seven thousand, nine hundred seventy-one".