681592943 has 8 divisors (see below), whose sum is σ = 693208320. Its totient is φ = 670020120.

The previous prime is 681592937. The next prime is 681592969. The reversal of 681592943 is 349295186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 681592943 - 2¹⁰ = 681591919 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 (681592973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22538 + ... + 43256.

It is an arithmetic number, because the mean of its divisors is an integer number (86651040).

Almost surely, 2^681592943 is an apocalyptic number.

681592943 is a deficient number, since it is larger than the sum of its proper divisors (11615377).

681592943 is a wasteful number, since it uses less digits than its factorization.

681592943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21277.

The product of its digits is 466560, while the sum is 47.

The square root of 681592943 is about 26107.3350420911. The cubic root of 681592943 is about 880.0520557188.

The spelling of 681592943 in words is "six hundred eighty-one million, five hundred ninety-two thousand, nine hundred forty-three".