680730901 has 4 divisors (see below), whose sum is σ = 682751212. Its totient is φ = 678710592.

The previous prime is 680730877. The next prime is 680730907. The reversal of 680730901 is 109037086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 390062500 + 290668401 = 19750^2 + 17049^2 .

It is a cyclic number.

It is not a de Polignac number, because 680730901 - 2⁹ = 680730389 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 (680730907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1009650 + ... + 1010323.

It is an arithmetic number, because the mean of its divisors is an integer number (170687803).

Almost surely, 2^680730901 is an apocalyptic number.

It is an amenable number.

680730901 is a deficient number, since it is larger than the sum of its proper divisors (2020311).

680730901 is a wasteful number, since it uses less digits than its factorization.

680730901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2020310.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 680730901 is about 26090.8202439095. The cubic root of 680730901 is about 879.6808850679.

Adding to 680730901 its reverse (109037086), we get a palindrome (789767987).

The spelling of 680730901 in words is "six hundred eighty million, seven hundred thirty thousand, nine hundred one".