19040039 has 2 divisors, whose sum is σ = 19040040. Its totient is φ = 19040038.

The previous prime is 19040023. The next prime is 19040041. The reversal of 19040039 is 93004091.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (93004091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19040039 - 2⁴ = 19040023 is a prime.

Together with 19040041, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19040009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9520019 + 9520020.

It is an arithmetic number, because the mean of its divisors is an integer number (9520020).

Almost surely, 2^19040039 is an apocalyptic number.

19040039 is a deficient number, since it is larger than the sum of its proper divisors (1).

19040039 is an equidigital number, since it uses as much as digits as its factorization.

19040039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 19040039 is about 4363.4893147572. The cubic root of 19040039 is about 267.0274721928.

The spelling of 19040039 in words is "nineteen million, forty thousand, thirty-nine".