681707042 has 8 divisors (see below), whose sum is σ = 1076379600. Its totient is φ = 322913844.

The previous prime is 681707027. The next prime is 681707071. The reversal of 681707042 is 240707186.

It is a happy number.

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

It is a super-2 number, since 2×681707042² = 929448982224779528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 681706993 and 681707011.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8969792 + ... + 8969867.

It is an arithmetic number, because the mean of its divisors is an integer number (134547450).

Almost surely, 2^681707042 is an apocalyptic number.

681707042 is a deficient number, since it is larger than the sum of its proper divisors (394672558).

681707042 is a wasteful number, since it uses less digits than its factorization.

681707042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17939680.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 681707042 is about 26109.5201411286. The cubic root of 681707042 is about 880.1011600305.

The spelling of 681707042 in words is "six hundred eighty-one million, seven hundred seven thousand, forty-two".