856481923 has 12 divisors (see below), whose sum is σ = 964389384. Its totient is φ = 759624800.

The previous prime is 856481891. The next prime is 856481929. The reversal of 856481923 is 329184658.

It is not a de Polignac number, because 856481923 - 2⁵ = 856481891 is a prime.

It is a super-2 number, since 2×856481923² = 1467122568851555858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (856481929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81361 + ... + 91282.

It is an arithmetic number, because the mean of its divisors is an integer number (80365782).

Almost surely, 2^856481923 is an apocalyptic number.

856481923 is a deficient number, since it is larger than the sum of its proper divisors (107907461).

856481923 is a wasteful number, since it uses less digits than its factorization.

856481923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172706 (or 172695 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 856481923 is about 29265.7124123094. The cubic root of 856481923 is about 949.6700324033.

It can be divided in two parts, 85648 and 1923, that added together give a triangular number (87571 = T₄₁₈).

The spelling of 856481923 in words is "eight hundred fifty-six million, four hundred eighty-one thousand, nine hundred twenty-three".