679993 has 2 divisors, whose sum is σ = 679994. Its totient is φ = 679992.

The previous prime is 679981. The next prime is 679999. The reversal of 679993 is 399976.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 620944 + 59049 = 788^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 679993 - 2⁵ = 679961 is a prime.

679993 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (679999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339996 + 339997.

It is an arithmetic number, because the mean of its divisors is an integer number (339997).

2⁶⁷⁹⁹⁹³ is an apocalyptic number.

It is an amenable number.

679993 is a deficient number, since it is larger than the sum of its proper divisors (1).

679993 is an equidigital number, since it uses as much as digits as its factorization.

679993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 43.

The square root of 679993 is about 824.6168807392. The cubic root of 679993 is about 87.9362916989.

The spelling of 679993 in words is "six hundred seventy-nine thousand, nine hundred ninety-three".