679173047 has 4 divisors (see below), whose sum is σ = 776197776. Its totient is φ = 582148320.

The previous prime is 679172987. The next prime is 679173067. The reversal of 679173047 is 740371976.

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

It is a cyclic number.

It is not a de Polignac number, because 679173047 - 2¹⁰ = 679172023 is a prime.

It is a super-2 number, since 2×679173047² = 922552055542528418, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 679172989 and 679173007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679173067) 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, 48512354 + ... + 48512367.

It is an arithmetic number, because the mean of its divisors is an integer number (194049444).

Almost surely, 2^679173047 is an apocalyptic number.

679173047 is a deficient number, since it is larger than the sum of its proper divisors (97024729).

679173047 is an equidigital number, since it uses as much as digits as its factorization.

679173047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97024728.

The product of its (nonzero) digits is 222264, while the sum is 44.

The square root of 679173047 is about 26060.9486972366. The cubic root of 679173047 is about 879.0093220400.

The spelling of 679173047 in words is "six hundred seventy-nine million, one hundred seventy-three thousand, forty-seven".