967721331 has 8 divisors (see below), whose sum is σ = 1300455424. Its totient is φ = 640067400.

The previous prime is 967721317. The next prime is 967721333. The reversal of 967721331 is 133127769.

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 967721331 - 2¹⁸ = 967459187 is a prime.

It is a super-2 number, since 2×967721331² = 1872969148944823122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 967721331.

It is not an unprimeable number, because it can be changed into a prime (967721333) 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, 1269595 + ... + 1270356.

It is an arithmetic number, because the mean of its divisors is an integer number (162556928).

Almost surely, 2^967721331 is an apocalyptic number.

967721331 is a deficient number, since it is larger than the sum of its proper divisors (332734093).

967721331 is a wasteful number, since it uses less digits than its factorization.

967721331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540081.

The product of its digits is 47628, while the sum is 39.

The square root of 967721331 is about 31108.2196694057. The cubic root of 967721331 is about 989.1225538338.

The spelling of 967721331 in words is "nine hundred sixty-seven million, seven hundred twenty-one thousand, three hundred thirty-one".