320976681 has 8 divisors (see below), whose sum is σ = 428457120. Its totient is φ = 213740352.

The previous prime is 320976679. The next prime is 320976703. The reversal of 320976681 is 186679023.

It is a happy number.

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

It is not a de Polignac number, because 320976681 - 2¹ = 320976679 is a prime.

It is a super-2 number, since 2×320976681² = 206052059491551522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (320976281) 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, 57936 + ... + 63233.

It is an arithmetic number, because the mean of its divisors is an integer number (53557140).

Almost surely, 2^320976681 is an apocalyptic number.

It is an amenable number.

320976681 is a deficient number, since it is larger than the sum of its proper divisors (107480439).

320976681 is a wasteful number, since it uses less digits than its factorization.

320976681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122055.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 320976681 is about 17915.8220855198. The cubic root of 320976681 is about 684.6855473257.

The spelling of 320976681 in words is "three hundred twenty million, nine hundred seventy-six thousand, six hundred eighty-one".