681335363 has 4 divisors (see below), whose sum is σ = 692883480. Its totient is φ = 669787248.

The previous prime is 681335351. The next prime is 681335377. The reversal of 681335363 is 363533186.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 681335363 - 2²⁶ = 614226499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (681331363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5773970 + ... + 5774087.

It is an arithmetic number, because the mean of its divisors is an integer number (173220870).

Almost surely, 2^681335363 is an apocalyptic number.

681335363 is a deficient number, since it is larger than the sum of its proper divisors (11548117).

681335363 is a wasteful number, since it uses less digits than its factorization.

681335363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11548116.

The product of its digits is 116640, while the sum is 38.

The square root of 681335363 is about 26102.4014795574. The cubic root of 681335363 is about 879.9411819331.

The spelling of 681335363 in words is "six hundred eighty-one million, three hundred thirty-five thousand, three hundred sixty-three".