679747 has 2 divisors, whose sum is σ = 679748. Its totient is φ = 679746.

The previous prime is 679741. The next prime is 679751. The reversal of 679747 is 747976.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 679747 - 2¹⁵ = 646979 is a prime.

It is not a weakly prime, because it can be changed into another prime (679741) 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, 339873 + 339874.

It is an arithmetic number, because the mean of its divisors is an integer number (339874).

2⁶⁷⁹⁷⁴⁷ is an apocalyptic number.

679747 is a deficient number, since it is larger than the sum of its proper divisors (1).

679747 is an equidigital number, since it uses as much as digits as its factorization.

679747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 40.

The square root of 679747 is about 824.4677070692. The cubic root of 679747 is about 87.9256862285.

The spelling of 679747 in words is "six hundred seventy-nine thousand, seven hundred forty-seven".