679975171 has 2 divisors, whose sum is σ = 679975172. Its totient is φ = 679975170.

The previous prime is 679975169. The next prime is 679975181. The reversal of 679975171 is 171579976.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 679975171 - 2¹ = 679975169 is a prime.

Together with 679975169, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (679975181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339987585 + 339987586.

It is an arithmetic number, because the mean of its divisors is an integer number (339987586).

Almost surely, 2^679975171 is an apocalyptic number.

679975171 is a deficient number, since it is larger than the sum of its proper divisors (1).

679975171 is an equidigital number, since it uses as much as digits as its factorization.

679975171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 833490, while the sum is 52.

The square root of 679975171 is about 26076.3335421221. Note that the first 3 decimals coincide. The cubic root of 679975171 is about 879.3552314696.

The spelling of 679975171 in words is "six hundred seventy-nine million, nine hundred seventy-five thousand, one hundred seventy-one".