19139143 has 2 divisors, whose sum is σ = 19139144. Its totient is φ = 19139142.

The previous prime is 19139129. The next prime is 19139173. The reversal of 19139143 is 34193191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19139143 - 2⁵ = 19139111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19139173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9569571 + 9569572.

It is an arithmetic number, because the mean of its divisors is an integer number (9569572).

Almost surely, 2^19139143 is an apocalyptic number.

19139143 is a deficient number, since it is larger than the sum of its proper divisors (1).

19139143 is an equidigital number, since it uses as much as digits as its factorization.

19139143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2916, while the sum is 31.

The square root of 19139143 is about 4374.8306252928. The cubic root of 19139143 is about 267.4899661418.

The spelling of 19139143 in words is "nineteen million, one hundred thirty-nine thousand, one hundred forty-three".