851676823 has 2 divisors, whose sum is σ = 851676824. Its totient is φ = 851676822.

The previous prime is 851676797. The next prime is 851676851. The reversal of 851676823 is 328676158.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-851676823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (851676883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425838411 + 425838412.

It is an arithmetic number, because the mean of its divisors is an integer number (425838412).

Almost surely, 2^851676823 is an apocalyptic number.

851676823 is a deficient number, since it is larger than the sum of its proper divisors (1).

851676823 is an equidigital number, since it uses as much as digits as its factorization.

851676823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The square root of 851676823 is about 29183.5025827950. The cubic root of 851676823 is about 947.8907304461.

The spelling of 851676823 in words is "eight hundred fifty-one million, six hundred seventy-six thousand, eight hundred twenty-three".