971268191 has 16 divisors (see below), whose sum is σ = 1042655328. Its totient is φ = 901555200.

The previous prime is 971268149. The next prime is 971268209. The reversal of 971268191 is 191862179.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971268191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971268131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384011 + ... + 386531.

It is an arithmetic number, because the mean of its divisors is an integer number (65165958).

Almost surely, 2^971268191 is an apocalyptic number.

971268191 is a deficient number, since it is larger than the sum of its proper divisors (71387137).

971268191 is a wasteful number, since it uses less digits than its factorization.

971268191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842.

The product of its digits is 54432, while the sum is 44.

The square root of 971268191 is about 31165.1759340454. The cubic root of 971268191 is about 990.3295134796.

The spelling of 971268191 in words is "nine hundred seventy-one million, two hundred sixty-eight thousand, one hundred ninety-one".