680788193 has 4 divisors (see below), whose sum is σ = 680851860. Its totient is φ = 680724528.

The previous prime is 680788189. The next prime is 680788211. The reversal of 680788193 is 391887086.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 253828624 + 426959569 = 15932^2 + 20663^2 .

It is a cyclic number.

It is not a de Polignac number, because 680788193 - 2² = 680788189 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680788133) 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, 11438 + ... + 38631.

It is an arithmetic number, because the mean of its divisors is an integer number (170212965).

Almost surely, 2^680788193 is an apocalyptic number.

It is an amenable number.

680788193 is a deficient number, since it is larger than the sum of its proper divisors (63667).

680788193 is a wasteful number, since it uses less digits than its factorization.

680788193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63666.

The product of its (nonzero) digits is 580608, while the sum is 50.

The square root of 680788193 is about 26091.9181548617. The cubic root of 680788193 is about 879.7055630836.

The spelling of 680788193 in words is "six hundred eighty million, seven hundred eighty-eight thousand, one hundred ninety-three".