856359149 has 2 divisors, whose sum is σ = 856359150. Its totient is φ = 856359148.

The previous prime is 856359109. The next prime is 856359167. The reversal of 856359149 is 941953658.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 703045225 + 153313924 = 26515^2 + 12382^2 .

It is a cyclic number.

It is not a de Polignac number, because 856359149 - 2¹² = 856355053 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 856359097 and 856359106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856359109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428179574 + 428179575.

It is an arithmetic number, because the mean of its divisors is an integer number (428179575).

Almost surely, 2^856359149 is an apocalyptic number.

It is an amenable number.

856359149 is a deficient number, since it is larger than the sum of its proper divisors (1).

856359149 is an equidigital number, since it uses as much as digits as its factorization.

856359149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 50.

The square root of 856359149 is about 29263.6147630466. The cubic root of 856359149 is about 949.6246528270.

The spelling of 856359149 in words is "eight hundred fifty-six million, three hundred fifty-nine thousand, one hundred forty-nine".