19120639 has 2 divisors, whose sum is σ = 19120640. Its totient is φ = 19120638.

The previous prime is 19120573. The next prime is 19120643. The reversal of 19120639 is 93602191.

It is a strong prime.

It is an emirp because it is prime and its reverse (93602191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19120639 - 2¹⁷ = 18989567 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19120639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19120649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9560319 + 9560320.

It is an arithmetic number, because the mean of its divisors is an integer number (9560320).

Almost surely, 2^19120639 is an apocalyptic number.

19120639 is a deficient number, since it is larger than the sum of its proper divisors (1).

19120639 is an equidigital number, since it uses as much as digits as its factorization.

19120639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 19120639 is about 4372.7152891539. The cubic root of 19120639 is about 267.4037339576.

The spelling of 19120639 in words is "nineteen million, one hundred twenty thousand, six hundred thirty-nine".