864179391 has 8 divisors (see below), whose sum is σ = 1202336640. Its totient is φ = 551070872.

The previous prime is 864179387. The next prime is 864179399. The reversal of 864179391 is 193971468.

It is a happy number.

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 864179391 - 2² = 864179387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864179391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864179399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6262101 + ... + 6262238.

It is an arithmetic number, because the mean of its divisors is an integer number (150292080).

Almost surely, 2^864179391 is an apocalyptic number.

864179391 is a deficient number, since it is larger than the sum of its proper divisors (338157249).

864179391 is a wasteful number, since it uses less digits than its factorization.

864179391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12524365.

The product of its digits is 326592, while the sum is 48.

The square root of 864179391 is about 29396.9282578980. The cubic root of 864179391 is about 952.5065445503.

The spelling of 864179391 in words is "eight hundred sixty-four million, one hundred seventy-nine thousand, three hundred ninety-one".