680565291 has 16 divisors (see below), whose sum is σ = 1040001024. Its totient is φ = 387788544.

The previous prime is 680565287. The next prime is 680565299. The reversal of 680565291 is 192565086.

It is not a de Polignac number, because 680565291 - 2² = 680565287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680565299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38491 + ... + 53316.

It is an arithmetic number, because the mean of its divisors is an integer number (65000064).

Almost surely, 2^680565291 is an apocalyptic number.

680565291 is a deficient number, since it is larger than the sum of its proper divisors (359435733).

680565291 is a wasteful number, since it uses less digits than its factorization.

680565291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92170.

The product of its (nonzero) digits is 129600, while the sum is 42.

The square root of 680565291 is about 26087.6463292494. The cubic root of 680565291 is about 879.6095422574.

The spelling of 680565291 in words is "six hundred eighty million, five hundred sixty-five thousand, two hundred ninety-one".