680987081 has 8 divisors (see below), whose sum is σ = 703094784. Its totient is φ = 659141280.

The previous prime is 680987011. The next prime is 680987107. The reversal of 680987081 is 180789086.

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

It is a cyclic number.

It is not a de Polignac number, because 680987081 - 2²² = 676792777 is a prime.

It is a super-2 number, since 2×680987081² = 927486808977801122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (680987011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60185 + ... + 70598.

It is an arithmetic number, because the mean of its divisors is an integer number (87886848).

Almost surely, 2^680987081 is an apocalyptic number.

It is an amenable number.

680987081 is a deficient number, since it is larger than the sum of its proper divisors (22107703).

680987081 is a wasteful number, since it uses less digits than its factorization.

680987081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130951.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 680987081 is about 26095.7291716480. The cubic root of 680987081 is about 879.7912215632.

The spelling of 680987081 in words is "six hundred eighty million, nine hundred eighty-seven thousand, eighty-one".