681839106 has 32 divisors (see below), whose sum is σ = 1477613760. Its totient is φ = 208505664.

The previous prime is 681839083. The next prime is 681839131. The reversal of 681839106 is 601938186.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14101 + ... + 39528.

It is an arithmetic number, because the mean of its divisors is an integer number (46175430).

Almost surely, 2^681839106 is an apocalyptic number.

681839106 is an abundant number, since it is smaller than the sum of its proper divisors (795774654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681839106 is a wasteful number, since it uses less digits than its factorization.

681839106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53810.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 681839106 is about 26112.0490578583. The cubic root of 681839106 is about 880.1579890239.

The spelling of 681839106 in words is "six hundred eighty-one million, eight hundred thirty-nine thousand, one hundred six".