856654373 has 2 divisors, whose sum is σ = 856654374. Its totient is φ = 856654372.

The previous prime is 856654363. The next prime is 856654391. The reversal of 856654373 is 373456658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 830419489 + 26234884 = 28817^2 + 5122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856654373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856654363) 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, 428327186 + 428327187.

It is an arithmetic number, because the mean of its divisors is an integer number (428327187).

Almost surely, 2^856654373 is an apocalyptic number.

It is an amenable number.

856654373 is a deficient number, since it is larger than the sum of its proper divisors (1).

856654373 is an equidigital number, since it uses as much as digits as its factorization.

856654373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 47.

The square root of 856654373 is about 29268.6585445934. The cubic root of 856654373 is about 949.7337658390.

The spelling of 856654373 in words is "eight hundred fifty-six million, six hundred fifty-four thousand, three hundred seventy-three".