679924697 has 4 divisors (see below), whose sum is σ = 684488100. Its totient is φ = 675361296.

The previous prime is 679924657. The next prime is 679924699. The reversal of 679924697 is 796429976.

679924697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127486681 + 552438016 = 11291^2 + 23504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679924697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679924699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2281478 + ... + 2281775.

It is an arithmetic number, because the mean of its divisors is an integer number (171122025).

Almost surely, 2^679924697 is an apocalyptic number.

It is an amenable number.

679924697 is a deficient number, since it is larger than the sum of its proper divisors (4563403).

679924697 is a wasteful number, since it uses less digits than its factorization.

679924697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563402.

The product of its digits is 10287648, while the sum is 59.

The square root of 679924697 is about 26075.3657117211. The cubic root of 679924697 is about 879.3334729917. Note that the first 3 decimals are identical.

The spelling of 679924697 in words is "six hundred seventy-nine million, nine hundred twenty-four thousand, six hundred ninety-seven".