681038599 has 4 divisors (see below), whose sum is σ = 681451264. Its totient is φ = 680625936.

The previous prime is 681038573. The next prime is 681038609. The reversal of 681038599 is 995830186.

681038599 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 681038599 - 2⁷ = 681038471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681038569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203847 + ... + 207160.

It is an arithmetic number, because the mean of its divisors is an integer number (170362816).

Almost surely, 2^681038599 is an apocalyptic number.

681038599 is a deficient number, since it is larger than the sum of its proper divisors (412665).

681038599 is a wasteful number, since it uses less digits than its factorization.

681038599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412664.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 681038599 is about 26096.7162493675. The cubic root of 681038599 is about 879.8134069773.

The spelling of 681038599 in words is "six hundred eighty-one million, thirty-eight thousand, five hundred ninety-nine".