191471911273 has 2 divisors, whose sum is σ = 191471911274. Its totient is φ = 191471911272.

The previous prime is 191471911249. The next prime is 191471911313. The reversal of 191471911273 is 372119174191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160823456784 + 30648454489 = 401028^2 + 175067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191471911273 is a prime.

It is a super-2 number, since 2×191471911273² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (191471911223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95735955636 + 95735955637.

It is an arithmetic number, because the mean of its divisors is an integer number (95735955637).

Almost surely, 2^191471911273 is an apocalyptic number.

It is an amenable number.

191471911273 is a deficient number, since it is larger than the sum of its proper divisors (1).

191471911273 is an equidigital number, since it uses as much as digits as its factorization.

191471911273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95256, while the sum is 46.

The spelling of 191471911273 in words is "one hundred ninety-one billion, four hundred seventy-one million, nine hundred eleven thousand, two hundred seventy-three".