851620823 has 8 divisors (see below), whose sum is σ = 880435680. Its totient is φ = 823111200.

The previous prime is 851620807. The next prime is 851620843. The reversal of 851620823 is 328026158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 851620823 - 2⁴ = 851620807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851620843) 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 in 7 ways as a sum of consecutive naturals, for example, 70628 + ... + 81801.

It is an arithmetic number, because the mean of its divisors is an integer number (110054460).

Almost surely, 2^851620823 is an apocalyptic number.

851620823 is a deficient number, since it is larger than the sum of its proper divisors (28814857).

851620823 is a wasteful number, since it uses less digits than its factorization.

851620823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152617.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 851620823 is about 29182.5431208454. The cubic root of 851620823 is about 947.8699545512.

The spelling of 851620823 in words is "eight hundred fifty-one million, six hundred twenty thousand, eight hundred twenty-three".