681003620 has 24 divisors (see below), whose sum is σ = 1560117888. Its totient is φ = 247637600.

The previous prime is 681003613. The next prime is 681003623. The reversal of 681003620 is 26300186.

It is a self number, because there is not a number n which added to its sum of digits gives 681003620.

It is not an unprimeable number, because it can be changed into a prime (681003623) 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, 1547516 + ... + 1547955.

It is an arithmetic number, because the mean of its divisors is an integer number (65004912).

Almost surely, 2^681003620 is an apocalyptic number.

It is an amenable number.

681003620 is an abundant number, since it is smaller than the sum of its proper divisors (879114268).

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

681003620 is a wasteful number, since it uses less digits than its factorization.

681003620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3095491 (or 3095489 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 681003620 is about 26096.0460606583. The cubic root of 681003620 is about 879.7983439446.

The spelling of 681003620 in words is "six hundred eighty-one million, three thousand, six hundred twenty".