681304570 has 8 divisors (see below), whose sum is σ = 1226348244. Its totient is φ = 272521824.

The previous prime is 681304549. The next prime is 681304571. The reversal of 681304570 is 75403186.

It can be written as a sum of positive squares in 2 ways, for example, as 657460881 + 23843689 = 25641^2 + 4883^2 .

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

It is not an unprimeable number, because it can be changed into a prime (681304571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34065219 + ... + 34065238.

Almost surely, 2^681304570 is an apocalyptic number.

681304570 is a deficient number, since it is larger than the sum of its proper divisors (545043674).

681304570 is a wasteful number, since it uses less digits than its factorization.

681304570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68130464.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 681304570 is about 26101.8116229506. The cubic root of 681304570 is about 879.9279253987.

The spelling of 681304570 in words is "six hundred eighty-one million, three hundred four thousand, five hundred seventy".