681487306 has 8 divisors (see below), whose sum is σ = 1046003904. Its totient is φ = 332819340.

The previous prime is 681487297. The next prime is 681487319. The reversal of 681487306 is 603784186.

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

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 3962050 + ... + 3962221.

It is an arithmetic number, because the mean of its divisors is an integer number (130750488).

Almost surely, 2^681487306 is an apocalyptic number.

681487306 is a deficient number, since it is larger than the sum of its proper divisors (364516598).

681487306 is a wasteful number, since it uses less digits than its factorization.

681487306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7924316.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 681487306 is about 26105.3118349504. The cubic root of 681487306 is about 880.0065882771.

The spelling of 681487306 in words is "six hundred eighty-one million, four hundred eighty-seven thousand, three hundred six".