19122839 has 2 divisors, whose sum is σ = 19122840. Its totient is φ = 19122838.

The previous prime is 19122827. The next prime is 19122847. The reversal of 19122839 is 93822191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19122839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19122799 and 19122808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19122869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9561419 + 9561420.

It is an arithmetic number, because the mean of its divisors is an integer number (9561420).

Almost surely, 2^19122839 is an apocalyptic number.

19122839 is a deficient number, since it is larger than the sum of its proper divisors (1).

19122839 is an equidigital number, since it uses as much as digits as its factorization.

19122839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 19122839 is about 4372.9668418592. The cubic root of 19122839 is about 267.4139892922.

The spelling of 19122839 in words is "nineteen million, one hundred twenty-two thousand, eight hundred thirty-nine".