680746739 has 4 divisors (see below), whose sum is σ = 697350360. Its totient is φ = 664143120.

The previous prime is 680746727. The next prime is 680746751. The reversal of 680746739 is 937647086.

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

It is an interprime number because it is at equal distance from previous prime (680746727) and next prime (680746751).

It is a cyclic number.

It is not a de Polignac number, because 680746739 - 2⁴ = 680746723 is a prime.

It is a super-2 number, since 2×680746739² = 926832245318268242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680746769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8301749 + ... + 8301830.

It is an arithmetic number, because the mean of its divisors is an integer number (174337590).

Almost surely, 2^680746739 is an apocalyptic number.

680746739 is a deficient number, since it is larger than the sum of its proper divisors (16603621).

680746739 is a wasteful number, since it uses less digits than its factorization.

680746739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16603620.

The product of its (nonzero) digits is 1524096, while the sum is 50.

The square root of 680746739 is about 26091.1237588571. The cubic root of 680746739 is about 879.6877072830.

The spelling of 680746739 in words is "six hundred eighty million, seven hundred forty-six thousand, seven hundred thirty-nine".