681738294 has 8 divisors (see below), whose sum is σ = 1363476600. Its totient is φ = 227246096.

The previous prime is 681738271. The next prime is 681738307. The reversal of 681738294 is 492837186.

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

681738294 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56811519 + ... + 56811530.

It is an arithmetic number, because the mean of its divisors is an integer number (170434575).

Almost surely, 2^681738294 is an apocalyptic number.

681738294 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

681738294 is a wasteful number, since it uses less digits than its factorization.

681738294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113623054.

The product of its digits is 580608, while the sum is 48.

The square root of 681738294 is about 26110.1186132886. The cubic root of 681738294 is about 880.1146088678.

It can be divided in two parts, 68173 and 8294, that added together give a palindrome (76467).

The spelling of 681738294 in words is "six hundred eighty-one million, seven hundred thirty-eight thousand, two hundred ninety-four".