144971191 has 2 divisors, whose sum is σ = 144971192. Its totient is φ = 144971190.

The previous prime is 144971173. The next prime is 144971207. The reversal of 144971191 is 191179441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 144971191 - 2⁷ = 144971063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144971191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144978191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72485595 + 72485596.

It is an arithmetic number, because the mean of its divisors is an integer number (72485596).

Almost surely, 2^144971191 is an apocalyptic number.

144971191 is a deficient number, since it is larger than the sum of its proper divisors (1).

144971191 is an equidigital number, since it uses as much as digits as its factorization.

144971191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 37.

The square root of 144971191 is about 12040.3982907543. The cubic root of 144971191 is about 525.3239917004.

The spelling of 144971191 in words is "one hundred forty-four million, nine hundred seventy-one thousand, one hundred ninety-one".