864172923 has 8 divisors (see below), whose sum is σ = 1152653136. Its totient is φ = 575904000.

The previous prime is 864172919. The next prime is 864172927. The reversal of 864172923 is 329271468.

It is an interprime number because it is at equal distance from previous prime (864172919) and next prime (864172927).

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

It is not a de Polignac number, because 864172923 - 2² = 864172919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (864172927) 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, 43018 + ... + 59823.

It is an arithmetic number, because the mean of its divisors is an integer number (144081642).

Almost surely, 2^864172923 is an apocalyptic number.

864172923 is a deficient number, since it is larger than the sum of its proper divisors (288480213).

864172923 is a wasteful number, since it uses less digits than its factorization.

864172923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105645.

The product of its digits is 145152, while the sum is 42.

The square root of 864172923 is about 29396.8182461980. The cubic root of 864172923 is about 952.5041681812.

The spelling of 864172923 in words is "eight hundred sixty-four million, one hundred seventy-two thousand, nine hundred twenty-three".