679949135 has 4 divisors (see below), whose sum is σ = 815938968. Its totient is φ = 543959304.

The previous prime is 679949131. The next prime is 679949159. The reversal of 679949135 is 531949976.

It is a happy number.

679949135 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 is a cyclic number.

It is not a de Polignac number, because 679949135 - 2² = 679949131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679949131) 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, 67994909 + ... + 67994918.

It is an arithmetic number, because the mean of its divisors is an integer number (203984742).

Almost surely, 2^679949135 is an apocalyptic number.

679949135 is a deficient number, since it is larger than the sum of its proper divisors (135989833).

679949135 is a wasteful number, since it uses less digits than its factorization.

679949135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135989832.

The product of its digits is 1837080, while the sum is 53.

The square root of 679949135 is about 26075.8343107177. The cubic root of 679949135 is about 879.3440079299.

The spelling of 679949135 in words is "six hundred seventy-nine million, nine hundred forty-nine thousand, one hundred thirty-five".