19139 has 2 divisors, whose sum is σ = 19140. Its totient is φ = 19138.
The previous prime is 19121. The next prime is 19141. The reversal of 19139 is 93191.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-19139 is a prime.
Together with 19141, it forms a pair of twin primes.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (19739) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a good prime.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9569 + 9570.
It is an arithmetic number, because the mean of its divisors is an integer number (9570).
219139 is an apocalyptic number.
19139 is a deficient number, since it is larger than the sum of its proper divisors (1).
19139 is an equidigital number, since it uses as much as digits as its factorization.
19139 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 243, while the sum is 23.
The square root of 19139 is about 138.3437747063. The cubic root of 19139 is about 26.7489299948.
The spelling of 19139 in words is "nineteen thousand, one hundred thirty-nine".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.063 sec. • engine limits •