864122159 has 4 divisors (see below), whose sum is σ = 864515904. Its totient is φ = 863728416.

The previous prime is 864122153. The next prime is 864122173. The reversal of 864122159 is 951221468.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864122159 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 (864122153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193562 + ... + 197975.

It is an arithmetic number, because the mean of its divisors is an integer number (216128976).

Almost surely, 2^864122159 is an apocalyptic number.

864122159 is a deficient number, since it is larger than the sum of its proper divisors (393745).

864122159 is a wasteful number, since it uses less digits than its factorization.

864122159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393744.

The product of its digits is 34560, while the sum is 38.

The square root of 864122159 is about 29395.9548067417. The cubic root of 864122159 is about 952.4855168723.

The spelling of 864122159 in words is "eight hundred sixty-four million, one hundred twenty-two thousand, one hundred fifty-nine".