191450143 has 2 divisors, whose sum is σ = 191450144. Its totient is φ = 191450142.

The previous prime is 191450131. The next prime is 191450167. The reversal of 191450143 is 341054191.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191450143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191450113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95725071 + 95725072.

It is an arithmetic number, because the mean of its divisors is an integer number (95725072).

Almost surely, 2^191450143 is an apocalyptic number.

191450143 is a deficient number, since it is larger than the sum of its proper divisors (1).

191450143 is an equidigital number, since it uses as much as digits as its factorization.

191450143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 191450143 is about 13836.5509792000. The cubic root of 191450143 is about 576.3485855769.

The spelling of 191450143 in words is "one hundred ninety-one million, four hundred fifty thousand, one hundred forty-three".