967721131 has 4 divisors (see below), whose sum is σ = 1042161232. Its totient is φ = 893281032.

The previous prime is 967721089. The next prime is 967721137. The reversal of 967721131 is 131127769.

967721131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 967721131 - 2⁷ = 967721003 is a prime.

It is a super-2 number, since 2×967721131² = 1872968374767838322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (967721137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37220031 + ... + 37220056.

It is an arithmetic number, because the mean of its divisors is an integer number (260540308).

Almost surely, 2^967721131 is an apocalyptic number.

967721131 is a deficient number, since it is larger than the sum of its proper divisors (74440101).

967721131 is a wasteful number, since it uses less digits than its factorization.

967721131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74440100.

The product of its digits is 15876, while the sum is 37.

The square root of 967721131 is about 31108.2164548211. The cubic root of 967721131 is about 989.1224856928.

It can be divided in two parts, 96772 and 1131, that added together give a triangular number (97903 = T₄₄₂).

The spelling of 967721131 in words is "nine hundred sixty-seven million, seven hundred twenty-one thousand, one hundred thirty-one".