681082306 has 4 divisors (see below), whose sum is σ = 1021623462. Its totient is φ = 340541152.

The previous prime is 681082267. The next prime is 681082321. The reversal of 681082306 is 603280186.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 603280186 = 2 ⋅301640093.

It can be written as a sum of positive squares in only one way, i.e., 405821025 + 275261281 = 20145^2 + 16591^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170270575 + ... + 170270578.

Almost surely, 2^681082306 is an apocalyptic number.

681082306 is a deficient number, since it is larger than the sum of its proper divisors (340541156).

681082306 is a wasteful number, since it uses less digits than its factorization.

681082306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340541155.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 681082306 is about 26097.5536401403. The cubic root of 681082306 is about 879.8322278303.

The spelling of 681082306 in words is "six hundred eighty-one million, eighty-two thousand, three hundred six".