681332569 has 8 divisors (see below), whose sum is σ = 685181952. Its totient is φ = 677490720.

The previous prime is 681332557. The next prime is 681332593. The reversal of 681332569 is 965233186.

681332569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 681332569 - 2¹¹ = 681330521 is a prime.

It is a super-2 number, since 2×681332569² = 928428139160279522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681332599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 329232 + ... + 331294.

It is an arithmetic number, because the mean of its divisors is an integer number (85647744).

Almost surely, 2^681332569 is an apocalyptic number.

It is an amenable number.

681332569 is a deficient number, since it is larger than the sum of its proper divisors (3849383).

681332569 is a wasteful number, since it uses less digits than its factorization.

681332569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3767.

The product of its digits is 233280, while the sum is 43.

The square root of 681332569 is about 26102.3479595227. The cubic root of 681332569 is about 879.9399791191.

The spelling of 681332569 in words is "six hundred eighty-one million, three hundred thirty-two thousand, five hundred sixty-nine".