681337204 has 24 divisors (see below), whose sum is σ = 1212699488. Its totient is φ = 334873440.

The previous prime is 681337201. The next prime is 681337247. The reversal of 681337204 is 402733186.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 681337204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681337201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137734 + ... + 142594.

Almost surely, 2^681337204 is an apocalyptic number.

It is an amenable number.

681337204 is a deficient number, since it is larger than the sum of its proper divisors (531362284).

681337204 is a wasteful number, since it uses less digits than its factorization.

681337204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5455 (or 5453 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 681337204 is about 26102.4367444881. The cubic root of 681337204 is about 879.9419744798.

The spelling of 681337204 in words is "six hundred eighty-one million, three hundred thirty-seven thousand, two hundred four".