19072139 has 2 divisors, whose sum is σ = 19072140. Its totient is φ = 19072138.

The previous prime is 19072121. The next prime is 19072187. The reversal of 19072139 is 93127091.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19072139 - 2¹² = 19068043 is a prime.

It is not a weakly prime, because it can be changed into another prime (19072189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9536069 + 9536070.

It is an arithmetic number, because the mean of its divisors is an integer number (9536070).

Almost surely, 2^19072139 is an apocalyptic number.

19072139 is a deficient number, since it is larger than the sum of its proper divisors (1).

19072139 is an equidigital number, since it uses as much as digits as its factorization.

19072139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 19072139 is about 4367.1660147056. The cubic root of 19072139 is about 267.1774503407.

The spelling of 19072139 in words is "nineteen million, seventy-two thousand, one hundred thirty-nine".