923681 has 8 divisors (see below), whose sum is σ = 1016928. Its totient is φ = 832000.

The previous prime is 923653. The next prime is 923687. The reversal of 923681 is 186329.

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 923681 - 2⁶ = 923617 is a prime.

It is a super-2 number, since 2×923681² = 1706373179522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (923687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1121 + ... + 1761.

It is an arithmetic number, because the mean of its divisors is an integer number (127116).

2⁹²³⁶⁸¹ is an apocalyptic number.

It is an amenable number.

923681 is a deficient number, since it is larger than the sum of its proper divisors (93247).

923681 is a wasteful number, since it uses less digits than its factorization.

923681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783.

The product of its digits is 2592, while the sum is 29.

The square root of 923681 is about 961.0832430128. The cubic root of 923681 is about 97.3884237556.

It can be divided in two parts, 92 and 3681, that added together give a palindrome (3773).

The spelling of 923681 in words is "nine hundred twenty-three thousand, six hundred eighty-one".