679637747 has 8 divisors (see below), whose sum is σ = 736352496. Its totient is φ = 624782592.

The previous prime is 679637743. The next prime is 679637767. The reversal of 679637747 is 747736976.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 679637747 - 2² = 679637743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 679637692 and 679637701.

It is not an unprimeable number, because it can be changed into a prime (679637743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464138 + ... + 465599.

It is an arithmetic number, because the mean of its divisors is an integer number (92044062).

Almost surely, 2^679637747 is an apocalyptic number.

679637747 is a deficient number, since it is larger than the sum of its proper divisors (56714749).

679637747 is a wasteful number, since it uses less digits than its factorization.

679637747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929797.

The product of its digits is 9335088, while the sum is 56.

The square root of 679637747 is about 26069.8628112999. The cubic root of 679637747 is about 879.2097532887.

The spelling of 679637747 in words is "six hundred seventy-nine million, six hundred thirty-seven thousand, seven hundred forty-seven".