861479923 has 8 divisors (see below), whose sum is σ = 867326400. Its totient is φ = 855645288.

The previous prime is 861479891. The next prime is 861479951. The reversal of 861479923 is 329974168.

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 861479923 - 2⁵ = 861479891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861479953) 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, 180040 + ... + 184762.

It is an arithmetic number, because the mean of its divisors is an integer number (108415800).

Almost surely, 2^861479923 is an apocalyptic number.

861479923 is a deficient number, since it is larger than the sum of its proper divisors (5846477).

861479923 is a wasteful number, since it uses less digits than its factorization.

861479923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5921.

The product of its digits is 653184, while the sum is 49.

The square root of 861479923 is about 29350.9782290131. The cubic root of 861479923 is about 951.5137171611.

The spelling of 861479923 in words is "eight hundred sixty-one million, four hundred seventy-nine thousand, nine hundred twenty-three".