851212867 has 2 divisors, whose sum is σ = 851212868. Its totient is φ = 851212866.

The previous prime is 851212847. The next prime is 851212871. The reversal of 851212867 is 768212158.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851212867 is a prime.

It is not a weakly prime, because it can be changed into another prime (851212837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425606433 + 425606434.

It is an arithmetic number, because the mean of its divisors is an integer number (425606434).

Almost surely, 2^851212867 is an apocalyptic number.

851212867 is a deficient number, since it is larger than the sum of its proper divisors (1).

851212867 is an equidigital number, since it uses as much as digits as its factorization.

851212867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 53760, while the sum is 40.

The square root of 851212867 is about 29175.5525568926. The cubic root of 851212867 is about 947.7185761494.

The spelling of 851212867 in words is "eight hundred fifty-one million, two hundred twelve thousand, eight hundred sixty-seven".