680917499 has 4 divisors (see below), whose sum is σ = 681169560. Its totient is φ = 680665440.

The previous prime is 680917481. The next prime is 680917561. The reversal of 680917499 is 994719086.

It is a happy number.

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 680917499 - 2⁸ = 680917243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 680917499.

It is not an unprimeable number, because it can be changed into a prime (680917429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121934 + ... + 127395.

It is an arithmetic number, because the mean of its divisors is an integer number (170292390).

Almost surely, 2^680917499 is an apocalyptic number.

680917499 is a deficient number, since it is larger than the sum of its proper divisors (252061).

680917499 is a wasteful number, since it uses less digits than its factorization.

680917499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252060.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 680917499 is about 26094.3959309274. The cubic root of 680917499 is about 879.7612553961.

The spelling of 680917499 in words is "six hundred eighty million, nine hundred seventeen thousand, four hundred ninety-nine".