681474159 has 24 divisors (see below), whose sum is σ = 1055723760. Its totient is φ = 422278272.

The previous prime is 681474151. The next prime is 681474173. The reversal of 681474159 is 951474186.

It is not a de Polignac number, because 681474159 - 2³ = 681474151 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681474151) 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 23 ways as a sum of consecutive naturals, for example, 28534 + ... + 46659.

It is an arithmetic number, because the mean of its divisors is an integer number (43988490).

Almost surely, 2^681474159 is an apocalyptic number.

681474159 is a deficient number, since it is larger than the sum of its proper divisors (374249601).

681474159 is a wasteful number, since it uses less digits than its factorization.

681474159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75271 (or 75268 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 681474159 is about 26105.0600267458. The cubic root of 681474159 is about 880.0009293206. Note that the first 3 decimals are identical.

The spelling of 681474159 in words is "six hundred eighty-one million, four hundred seventy-four thousand, one hundred fifty-nine".