864840623 has 8 divisors (see below), whose sum is σ = 883350192. Its totient is φ = 846495936.

The previous prime is 864840611. The next prime is 864840631. The reversal of 864840623 is 326048468.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864840623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864840023) 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, 30590 + ... + 51627.

It is an arithmetic number, because the mean of its divisors is an integer number (110418774).

Almost surely, 2^864840623 is an apocalyptic number.

864840623 is a deficient number, since it is larger than the sum of its proper divisors (18509569).

864840623 is a wasteful number, since it uses less digits than its factorization.

864840623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82441.

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 864840623 is about 29408.1727246016. The cubic root of 864840623 is about 952.7494212969.

The spelling of 864840623 in words is "eight hundred sixty-four million, eight hundred forty thousand, six hundred twenty-three".