679987249 has 8 divisors (see below), whose sum is σ = 709817472. Its totient is φ = 650179200.

The previous prime is 679987177. The next prime is 679987261. The reversal of 679987249 is 942789976.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-679987249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679987279) 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, 100524 + ... + 107074.

It is an arithmetic number, because the mean of its divisors is an integer number (88727184).

Almost surely, 2^679987249 is an apocalyptic number.

It is an amenable number.

679987249 is a deficient number, since it is larger than the sum of its proper divisors (29830223).

679987249 is a wasteful number, since it uses less digits than its factorization.

679987249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11087.

The product of its digits is 13716864, while the sum is 61.

The square root of 679987249 is about 26076.5651304001. The cubic root of 679987249 is about 879.3604379291.

The spelling of 679987249 in words is "six hundred seventy-nine million, nine hundred eighty-seven thousand, two hundred forty-nine".