19139459 has 2 divisors, whose sum is σ = 19139460. Its totient is φ = 19139458.

The previous prime is 19139437. The next prime is 19139489. The reversal of 19139459 is 95493191.

It is a weak prime.

It is an emirp because it is prime and its reverse (95493191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19139459 - 2⁸ = 19139203 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19139489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9569729 + 9569730.

It is an arithmetic number, because the mean of its divisors is an integer number (9569730).

Almost surely, 2^19139459 is an apocalyptic number.

19139459 is a deficient number, since it is larger than the sum of its proper divisors (1).

19139459 is an equidigital number, since it uses as much as digits as its factorization.

19139459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 41.

The square root of 19139459 is about 4374.8667408277. The cubic root of 19139459 is about 267.4914382796.

The spelling of 19139459 in words is "nineteen million, one hundred thirty-nine thousand, four hundred fifty-nine".