856412949 has 32 divisors (see below), whose sum is σ = 1355397120. Its totient is φ = 470619072.

The previous prime is 856412941. The next prime is 856412957. The reversal of 856412949 is 949214658.

856412949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (856412941) and next prime (856412957).

It is not a de Polignac number, because 856412949 - 2³ = 856412941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 856412898 and 856412907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856412941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157494 + ... + 162840.

It is an arithmetic number, because the mean of its divisors is an integer number (42356160).

Almost surely, 2^856412949 is an apocalyptic number.

It is an amenable number.

856412949 is a deficient number, since it is larger than the sum of its proper divisors (498984171).

856412949 is a wasteful number, since it uses less digits than its factorization.

856412949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5649.

The product of its digits is 622080, while the sum is 48.

The square root of 856412949 is about 29264.5339788625. The cubic root of 856412949 is about 949.6445388513.

The spelling of 856412949 in words is "eight hundred fifty-six million, four hundred twelve thousand, nine hundred forty-nine".