679999459 has 2 divisors, whose sum is σ = 679999460. Its totient is φ = 679999458.

The previous prime is 679999457. The next prime is 679999469. The reversal of 679999459 is 954999976.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 679999459 - 2¹ = 679999457 is a prime.

Together with 679999457, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 679999394 and 679999403.

It is not a weakly prime, because it can be changed into another prime (679999457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339999729 + 339999730.

It is an arithmetic number, because the mean of its divisors is an integer number (339999730).

Almost surely, 2^679999459 is an apocalyptic number.

679999459 is a deficient number, since it is larger than the sum of its proper divisors (1).

679999459 is an equidigital number, since it uses as much as digits as its factorization.

679999459 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49601160, while the sum is 67.

The square root of 679999459 is about 26076.7992476071. The cubic root of 679999459 is about 879.3657012272.

The spelling of 679999459 in words is "six hundred seventy-nine million, nine hundred ninety-nine thousand, four hundred fifty-nine".