679576349 has 2 divisors, whose sum is σ = 679576350. Its totient is φ = 679576348.

The previous prime is 679576297. The next prime is 679576487. The reversal of 679576349 is 943675976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615288025 + 64288324 = 24805^2 + 8018^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679576349 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 679576294 and 679576303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679576949) 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 as a sum of consecutive naturals, namely, 339788174 + 339788175.

It is an arithmetic number, because the mean of its divisors is an integer number (339788175).

Almost surely, 2^679576349 is an apocalyptic number.

It is an amenable number.

679576349 is a deficient number, since it is larger than the sum of its proper divisors (1).

679576349 is an equidigital number, since it uses as much as digits as its factorization.

679576349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8573040, while the sum is 56.

The square root of 679576349 is about 26068.6852180926. The cubic root of 679576349 is about 879.1832767594.

The spelling of 679576349 in words is "six hundred seventy-nine million, five hundred seventy-six thousand, three hundred forty-nine".