681404073 has 32 divisors (see below), whose sum is σ = 1065332736. Its totient is φ = 379325568.

The previous prime is 681404071. The next prime is 681404089. The reversal of 681404073 is 370404186.

681404073 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 681404073 - 2¹ = 681404071 is a prime.

It is not an unprimeable number, because it can be changed into a prime (681404071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228490 + ... + 231452.

It is an arithmetic number, because the mean of its divisors is an integer number (33291648).

Almost surely, 2^681404073 is an apocalyptic number.

It is an amenable number.

681404073 is a deficient number, since it is larger than the sum of its proper divisors (383928663).

681404073 is a wasteful number, since it uses less digits than its factorization.

681404073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3253.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 681404073 is about 26103.7176088005. The cubic root of 681404073 is about 879.9707604782.

The spelling of 681404073 in words is "six hundred eighty-one million, four hundred four thousand, seventy-three".