681593941 has 8 divisors (see below), whose sum is σ = 779214464. Its totient is φ = 584035920.

The previous prime is 681593921. The next prime is 681593981. The reversal of 681593941 is 149395186.

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 681593941 - 2⁷ = 681593813 is a prime.

It is a super-2 number, since 2×681593941² = 929140600815822962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 681593891 and 681593900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681593911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10711 + ... + 38443.

It is an arithmetic number, because the mean of its divisors is an integer number (97401808).

Almost surely, 2^681593941 is an apocalyptic number.

It is an amenable number.

681593941 is a deficient number, since it is larger than the sum of its proper divisors (97620523).

681593941 is a wasteful number, since it uses less digits than its factorization.

681593941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31251.

The product of its digits is 233280, while the sum is 46.

The square root of 681593941 is about 26107.3541554865. The cubic root of 681593941 is about 880.0524852477.

The spelling of 681593941 in words is "six hundred eighty-one million, five hundred ninety-three thousand, nine hundred forty-one".