679867493 has 2 divisors, whose sum is σ = 679867494. Its totient is φ = 679867492.

The previous prime is 679867483. The next prime is 679867577. The reversal of 679867493 is 394768976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672987364 + 6880129 = 25942^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 679867493 - 2⁴ = 679867477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679867403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339933746 + 339933747.

It is an arithmetic number, because the mean of its divisors is an integer number (339933747).

Almost surely, 2^679867493 is an apocalyptic number.

It is an amenable number.

679867493 is a deficient number, since it is larger than the sum of its proper divisors (1).

679867493 is an equidigital number, since it uses as much as digits as its factorization.

679867493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 59.

The square root of 679867493 is about 26074.2687912816. The cubic root of 679867493 is about 879.3088120241.

The spelling of 679867493 in words is "six hundred seventy-nine million, eight hundred sixty-seven thousand, four hundred ninety-three".