679511449 has 2 divisors, whose sum is σ = 679511450. Its totient is φ = 679511448.

The previous prime is 679511447. The next prime is 679511461. The reversal of 679511449 is 944115976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346704400 + 332807049 = 18620^2 + 18243^2 .

It is a cyclic number.

It is not a de Polignac number, because 679511449 - 2¹ = 679511447 is a prime.

Together with 679511447, 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 = 679511399 and 679511408.

It is not a weakly prime, because it can be changed into another prime (679511447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339755724 + 339755725.

It is an arithmetic number, because the mean of its divisors is an integer number (339755725).

Almost surely, 2^679511449 is an apocalyptic number.

It is an amenable number.

679511449 is a deficient number, since it is larger than the sum of its proper divisors (1).

679511449 is an equidigital number, since it uses as much as digits as its factorization.

679511449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 679511449 is about 26067.4403998551. The cubic root of 679511449 is about 879.1552883363.

The spelling of 679511449 in words is "six hundred seventy-nine million, five hundred eleven thousand, four hundred forty-nine".