680344901 has 4 divisors (see below), whose sum is σ = 703805100. Its totient is φ = 656884704.

The previous prime is 680344897. The next prime is 680344921. The reversal of 680344901 is 109443086.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 109443086 = 2 ⋅54721543.

It can be written as a sum of positive squares in 2 ways, for example, as 556912801 + 123432100 = 23599^2 + 11110^2 .

It is a cyclic number.

It is not a de Polignac number, because 680344901 - 2² = 680344897 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 (680344921) 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, 11730056 + ... + 11730113.

It is an arithmetic number, because the mean of its divisors is an integer number (175951275).

Almost surely, 2^680344901 is an apocalyptic number.

It is an amenable number.

680344901 is a deficient number, since it is larger than the sum of its proper divisors (23460199).

680344901 is a wasteful number, since it uses less digits than its factorization.

680344901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23460198.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 680344901 is about 26083.4219572509. The cubic root of 680344901 is about 879.5145829252.

Adding to 680344901 its reverse (109443086), we get a palindrome (789787987).

The spelling of 680344901 in words is "six hundred eighty million, three hundred forty-four thousand, nine hundred one".