879209161 has 4 divisors (see below), whose sum is σ = 879268500. Its totient is φ = 879149824.

The previous prime is 879209159. The next prime is 879209167. The reversal of 879209161 is 161902978.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 706549561 + 172659600 = 26581^2 + 13140^2 .

It is a cyclic number.

It is not a de Polignac number, because 879209161 - 2¹ = 879209159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (879209167) 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, 13305 + ... + 43993.

It is an arithmetic number, because the mean of its divisors is an integer number (219817125).

Almost surely, 2^879209161 is an apocalyptic number.

It is an amenable number.

879209161 is a deficient number, since it is larger than the sum of its proper divisors (59339).

879209161 is a wasteful number, since it uses less digits than its factorization.

879209161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59338.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 879209161 is about 29651.4613636495. The cubic root of 879209161 is about 957.9968216124.

The spelling of 879209161 in words is "eight hundred seventy-nine million, two hundred nine thousand, one hundred sixty-one".