679999469 has 2 divisors, whose sum is σ = 679999470. Its totient is φ = 679999468.

The previous prime is 679999459. The next prime is 679999471. The reversal of 679999469 is 964999976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 509043844 + 170955625 = 22562^2 + 13075^2 .

It is a cyclic number.

It is not a de Polignac number, because 679999469 - 2⁸ = 679999213 is a prime.

It is a super-2 number, since 2×679999469² = 924798555680563922, which contains 22 as substring.

Together with 679999471, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 679999399 and 679999408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679999429) 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 as a sum of consecutive naturals, namely, 339999734 + 339999735.

It is an arithmetic number, because the mean of its divisors is an integer number (339999735).

Almost surely, 2^679999469 is an apocalyptic number.

It is an amenable number.

679999469 is a deficient number, since it is larger than the sum of its proper divisors (1).

679999469 is an equidigital number, since it uses as much as digits as its factorization.

679999469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59521392, while the sum is 68.

The square root of 679999469 is about 26076.7994393484. The cubic root of 679999469 is about 879.3657055378.

The spelling of 679999469 in words is "six hundred seventy-nine million, nine hundred ninety-nine thousand, four hundred sixty-nine".