679679633 has 2 divisors, whose sum is σ = 679679634. Its totient is φ = 679679632.

The previous prime is 679679597. The next prime is 679679639. The reversal of 679679633 is 336976976.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437939329 + 241740304 = 20927^2 + 15548^2 .

It is a cyclic number.

It is not a de Polignac number, because 679679633 - 2⁶ = 679679569 is a prime.

It is a super-4 number, since 4×679679633⁴ (a number of 36 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (679679639) 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, 339839816 + 339839817.

It is an arithmetic number, because the mean of its divisors is an integer number (339839817).

Almost surely, 2^679679633 is an apocalyptic number.

It is an amenable number.

679679633 is a deficient number, since it is larger than the sum of its proper divisors (1).

679679633 is an equidigital number, since it uses as much as digits as its factorization.

679679633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7715736, while the sum is 56.

The square root of 679679633 is about 26070.6661403195. Note that the first 3 decimals coincide. The cubic root of 679679633 is about 879.2278147846.

The spelling of 679679633 in words is "six hundred seventy-nine million, six hundred seventy-nine thousand, six hundred thirty-three".