680620999 has 8 divisors (see below), whose sum is σ = 689375232. Its totient is φ = 671880120.

The previous prime is 680620987. The next prime is 680621023. The reversal of 680620999 is 999026086.

It is a happy number.

680620999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 680620999 - 2⁹ = 680620487 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 (680621999) 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, 135564 + ... + 140494.

It is an arithmetic number, because the mean of its divisors is an integer number (86171904).

Almost surely, 2^680620999 is an apocalyptic number.

680620999 is a deficient number, since it is larger than the sum of its proper divisors (8754233).

680620999 is a wasteful number, since it uses less digits than its factorization.

680620999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6677.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 680620999 is about 26088.7140158345. The cubic root of 680620999 is about 879.6335418903.

The spelling of 680620999 in words is "six hundred eighty million, six hundred twenty thousand, nine hundred ninety-nine".