680709997 has 8 divisors (see below), whose sum is σ = 766547712. Its totient is φ = 598864800.

The previous prime is 680709973. The next prime is 680710027. The reversal of 680709997 is 799907086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680709997 is a prime.

It is a super-2 number, since 2×680709997² = 926732200031480018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680709907) 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, 997768 + ... + 998449.

It is an arithmetic number, because the mean of its divisors is an integer number (95818464).

Almost surely, 2^680709997 is an apocalyptic number.

It is an amenable number.

680709997 is a deficient number, since it is larger than the sum of its proper divisors (85837715).

680709997 is a wasteful number, since it uses less digits than its factorization.

680709997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996259.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The square root of 680709997 is about 26090.4196401668. The cubic root of 680709997 is about 879.6718805125.

The spelling of 680709997 in words is "six hundred eighty million, seven hundred nine thousand, nine hundred ninety-seven".