684568137 has 16 divisors (see below), whose sum is σ = 1001306880. Its totient is φ = 412568400.

The previous prime is 684568111. The next prime is 684568139. The reversal of 684568137 is 731865486.

684568137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 684568137 - 2²⁶ = 617459273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684568139) 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, 52039 + ... + 63852.

It is an arithmetic number, because the mean of its divisors is an integer number (62581680).

Almost surely, 2^684568137 is an apocalyptic number.

It is an amenable number.

684568137 is a deficient number, since it is larger than the sum of its proper divisors (316738743).

684568137 is a wasteful number, since it uses less digits than its factorization.

684568137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116084.

The product of its digits is 967680, while the sum is 48.

The square root of 684568137 is about 26164.2530373026. The cubic root of 684568137 is about 881.3306903832.

The spelling of 684568137 in words is "six hundred eighty-four million, five hundred sixty-eight thousand, one hundred thirty-seven".