681799034 has 12 divisors (see below), whose sum is σ = 1189669914. Its totient is φ = 292199544.

The previous prime is 681798989. The next prime is 681799039. The reversal of 681799034 is 430997186.

It can be written as a sum of positive squares in only one way, i.e., 355888225 + 325910809 = 18865^2 + 18053^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 681799034.

It is not an unprimeable number, because it can be changed into a prime (681799039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3478469 + ... + 3478664.

Almost surely, 2^681799034 is an apocalyptic number.

681799034 is a deficient number, since it is larger than the sum of its proper divisors (507870880).

681799034 is a wasteful number, since it uses less digits than its factorization.

681799034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6957149 (or 6957142 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 681799034 is about 26111.2817379768. The cubic root of 681799034 is about 880.1407462552.

The spelling of 681799034 in words is "six hundred eighty-one million, seven hundred ninety-nine thousand, thirty-four".