19143149 has 2 divisors, whose sum is σ = 19143150. Its totient is φ = 19143148.

The previous prime is 19143133. The next prime is 19143181. The reversal of 19143149 is 94134191.

It is an a-pointer prime, because the next prime (19143181) can be obtained adding 19143149 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18550249 + 592900 = 4307^2 + 770^2 .

It is a cyclic number.

It is not a de Polignac number, because 19143149 - 2⁴ = 19143133 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 (19143109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9571574 + 9571575.

It is an arithmetic number, because the mean of its divisors is an integer number (9571575).

Almost surely, 2^19143149 is an apocalyptic number.

It is an amenable number.

19143149 is a deficient number, since it is larger than the sum of its proper divisors (1).

19143149 is an equidigital number, since it uses as much as digits as its factorization.

19143149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 32.

The square root of 19143149 is about 4375.2884476341. The cubic root of 19143149 is about 267.5086275495.

The spelling of 19143149 in words is "nineteen million, one hundred forty-three thousand, one hundred forty-nine".