679491306 has 48 divisors (see below), whose sum is σ = 1592190600. Its totient is φ = 208189440.

The previous prime is 679491301. The next prime is 679491313. The reversal of 679491306 is 603194976.

It can be written as a sum of positive squares in 4 ways, for example, as 595604025 + 83887281 = 24405^2 + 9159^2 .

It is not an unprimeable number, because it can be changed into a prime (679491301) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50370 + ... + 62418.

Almost surely, 2^679491306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679491306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796095300).

679491306 is an abundant number, since it is smaller than the sum of its proper divisors (912699294).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

679491306 is a wasteful number, since it uses less digits than its factorization.

679491306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12311 (or 12308 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 679491306 is about 26067.0540337799. The cubic root of 679491306 is about 879.1466012127.

The spelling of 679491306 in words is "six hundred seventy-nine million, four hundred ninety-one thousand, three hundred six".