856164229 has 2 divisors, whose sum is σ = 856164230. Its totient is φ = 856164228.

The previous prime is 856164223. The next prime is 856164299. The reversal of 856164229 is 922461658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 778689025 + 77475204 = 27905^2 + 8802^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856164229 is a prime.

It is equal to p_43881685 and since 856164229 and 43881685 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856164223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428082114 + 428082115.

It is an arithmetic number, because the mean of its divisors is an integer number (428082115).

Almost surely, 2^856164229 is an apocalyptic number.

It is an amenable number.

856164229 is a deficient number, since it is larger than the sum of its proper divisors (1).

856164229 is an equidigital number, since it uses as much as digits as its factorization.

856164229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 856164229 is about 29260.2841578820. The cubic root of 856164229 is about 949.5525978241.

The spelling of 856164229 in words is "eight hundred fifty-six million, one hundred sixty-four thousand, two hundred twenty-nine".