679633 has 2 divisors, whose sum is σ = 679634. Its totient is φ = 679632.

The previous prime is 679607. The next prime is 679639. The reversal of 679633 is 336976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677329 + 2304 = 823^2 + 48^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679633 is a prime.

It is not a weakly prime, because it can be changed into another prime (679639) 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, 339816 + 339817.

It is an arithmetic number, because the mean of its divisors is an integer number (339817).

2⁶⁷⁹⁶³³ is an apocalyptic number.

It is an amenable number.

679633 is a deficient number, since it is larger than the sum of its proper divisors (1).

679633 is an equidigital number, since it uses as much as digits as its factorization.

679633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 34.

The square root of 679633 is about 824.3985686547. The cubic root of 679633 is about 87.9207706307.

The spelling of 679633 in words is "six hundred seventy-nine thousand, six hundred thirty-three".