867823161 has 4 divisors (see below), whose sum is σ = 1157097552. Its totient is φ = 578548772.

The previous prime is 867823147. The next prime is 867823169. The reversal of 867823161 is 161328768.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-867823161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (867823169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144637191 + ... + 144637196.

It is an arithmetic number, because the mean of its divisors is an integer number (289274388).

Almost surely, 2^867823161 is an apocalyptic number.

It is an amenable number.

867823161 is a deficient number, since it is larger than the sum of its proper divisors (289274391).

867823161 is a wasteful number, since it uses less digits than its factorization.

867823161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289274390.

The product of its digits is 96768, while the sum is 42.

The square root of 867823161 is about 29458.8384190552. The cubic root of 867823161 is about 953.8433997487.

The spelling of 867823161 in words is "eight hundred sixty-seven million, eight hundred twenty-three thousand, one hundred sixty-one".