856071607 has 2 divisors, whose sum is σ = 856071608. Its totient is φ = 856071606.

The previous prime is 856071551. The next prime is 856071611. The reversal of 856071607 is 706170658.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856071607 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856071607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856071647) 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, 428035803 + 428035804.

It is an arithmetic number, because the mean of its divisors is an integer number (428035804).

Almost surely, 2^856071607 is an apocalyptic number.

856071607 is a deficient number, since it is larger than the sum of its proper divisors (1).

856071607 is an equidigital number, since it uses as much as digits as its factorization.

856071607 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 856071607 is about 29258.7013895012. The cubic root of 856071607 is about 949.5183549264.

The spelling of 856071607 in words is "eight hundred fifty-six million, seventy-one thousand, six hundred seven".