143991149 has 2 divisors, whose sum is σ = 143991150. Its totient is φ = 143991148.

The previous prime is 143991143. The next prime is 143991163. The reversal of 143991149 is 941199341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138815524 + 5175625 = 11782^2 + 2275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143991149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143991143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71995574 + 71995575.

It is an arithmetic number, because the mean of its divisors is an integer number (71995575).

Almost surely, 2^143991149 is an apocalyptic number.

It is an amenable number.

143991149 is a deficient number, since it is larger than the sum of its proper divisors (1).

143991149 is an equidigital number, since it uses as much as digits as its factorization.

143991149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 41.

The square root of 143991149 is about 11999.6312026662. The cubic root of 143991149 is about 524.1375396486.

The spelling of 143991149 in words is "one hundred forty-three million, nine hundred ninety-one thousand, one hundred forty-nine".