681010381 has 8 divisors (see below), whose sum is σ = 717263424. Its totient is φ = 645311040.

The previous prime is 681010373. The next prime is 681010397. The reversal of 681010381 is 183010186.

It is a happy number.

681010381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 681010381 - 2³ = 681010373 is a prime.

It is a super-2 number, since 2×681010381² = 927550278059530322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681010321) 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, 135900 + ... + 140821.

It is an arithmetic number, because the mean of its divisors is an integer number (89657928).

Almost surely, 2^681010381 is an apocalyptic number.

It is an amenable number.

681010381 is a deficient number, since it is larger than the sum of its proper divisors (36253043).

681010381 is a wasteful number, since it uses less digits than its factorization.

681010381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276851.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 681010381 is about 26096.1756010340. The cubic root of 681010381 is about 879.8012554793.

The spelling of 681010381 in words is "six hundred eighty-one million, ten thousand, three hundred eighty-one".