680920893 has 12 divisors (see below), whose sum is σ = 983789820. Its totient is φ = 453837696.

The previous prime is 680920871. The next prime is 680920897. The reversal of 680920893 is 398029086.

It can be written as a sum of positive squares in 2 ways, for example, as 270372249 + 410548644 = 16443^2 + 20262^2 .

It is not a de Polignac number, because 680920893 - 2⁸ = 680920637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680920897) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51223 + ... + 63131.

It is an arithmetic number, because the mean of its divisors is an integer number (81982485).

Almost surely, 2^680920893 is an apocalyptic number.

It is an amenable number.

680920893 is a deficient number, since it is larger than the sum of its proper divisors (302868927).

680920893 is a wasteful number, since it uses less digits than its factorization.

680920893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18268 (or 18265 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 680920893 is about 26094.4609639670. The cubic root of 680920893 is about 879.7627171027.

The spelling of 680920893 in words is "six hundred eighty million, nine hundred twenty thousand, eight hundred ninety-three".