679916161 has 4 divisors (see below), whose sum is σ = 696499524. Its totient is φ = 663332800.

The previous prime is 679916119. The next prime is 679916191. The reversal of 679916161 is 161619976.

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

It can be written as a sum of positive squares in 2 ways, for example, as 181063936 + 498852225 = 13456^2 + 22335^2 .

It is a cyclic number.

It is not a de Polignac number, because 679916161 - 2¹⁷ = 679785089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679916101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8291620 + ... + 8291701.

It is an arithmetic number, because the mean of its divisors is an integer number (174124881).

Almost surely, 2^679916161 is an apocalyptic number.

It is an amenable number.

679916161 is a deficient number, since it is larger than the sum of its proper divisors (16583363).

679916161 is a wasteful number, since it uses less digits than its factorization.

679916161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16583362.

The product of its digits is 122472, while the sum is 46.

The square root of 679916161 is about 26075.2020318156. The cubic root of 679916161 is about 879.3297931617.

The spelling of 679916161 in words is "six hundred seventy-nine million, nine hundred sixteen thousand, one hundred sixty-one".