19139347 has 2 divisors, whose sum is σ = 19139348. Its totient is φ = 19139346.

The previous prime is 19139303. The next prime is 19139353. The reversal of 19139347 is 74393191.

It is a strong prime.

It is an emirp because it is prime and its reverse (74393191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19139347 - 2¹⁵ = 19106579 is a prime.

It is not a weakly prime, because it can be changed into another prime (19139377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9569673 + 9569674.

It is an arithmetic number, because the mean of its divisors is an integer number (9569674).

Almost surely, 2^19139347 is an apocalyptic number.

19139347 is a deficient number, since it is larger than the sum of its proper divisors (1).

19139347 is an equidigital number, since it uses as much as digits as its factorization.

19139347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 19139347 is about 4374.8539404190. The cubic root of 19139347 is about 267.4909165111.

The spelling of 19139347 in words is "nineteen million, one hundred thirty-nine thousand, three hundred forty-seven".