681872229 has 32 divisors (see below), whose sum is σ = 1020902400. Its totient is φ = 449789760.

The previous prime is 681872203. The next prime is 681872299. The reversal of 681872229 is 922278186.

It is not a de Polignac number, because 681872229 - 2⁵ = 681872197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681872299) 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 31 ways as a sum of consecutive naturals, for example, 1619439 + ... + 1619859.

It is an arithmetic number, because the mean of its divisors is an integer number (31903200).

Almost surely, 2^681872229 is an apocalyptic number.

It is an amenable number.

681872229 is a deficient number, since it is larger than the sum of its proper divisors (339030171).

681872229 is a wasteful number, since it uses less digits than its factorization.

681872229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 916 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 681872229 is about 26112.6832975855. The cubic root of 681872229 is about 880.1722411648.

The spelling of 681872229 in words is "six hundred eighty-one million, eight hundred seventy-two thousand, two hundred twenty-nine".