681730246 has 8 divisors (see below), whose sum is σ = 1022707080. Its totient is φ = 340827888.

The previous prime is 681730229. The next prime is 681730249. The reversal of 681730246 is 642037186.

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

It is a super-2 number, since 2×681730246² = 929512256622441032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681730249) 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 3 ways as a sum of consecutive naturals, for example, 21925 + ... + 42943.

It is an arithmetic number, because the mean of its divisors is an integer number (127838385).

Almost surely, 2^681730246 is an apocalyptic number.

681730246 is a deficient number, since it is larger than the sum of its proper divisors (340976834).

681730246 is a wasteful number, since it uses less digits than its factorization.

681730246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37238.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 681730246 is about 26109.9644963374. The cubic root of 681730246 is about 880.1111455690. Note that the first 4 decimals are identical.

The spelling of 681730246 in words is "six hundred eighty-one million, seven hundred thirty thousand, two hundred forty-six".