19372139 has 2 divisors, whose sum is σ = 19372140. Its totient is φ = 19372138.

The previous prime is 19372123. The next prime is 19372147. The reversal of 19372139 is 93127391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19372139 - 2⁴ = 19372123 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 19372099 and 19372108.

It is not a weakly prime, because it can be changed into another prime (19372159) 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, 9686069 + 9686070.

It is an arithmetic number, because the mean of its divisors is an integer number (9686070).

Almost surely, 2^19372139 is an apocalyptic number.

19372139 is a deficient number, since it is larger than the sum of its proper divisors (1).

19372139 is an equidigital number, since it uses as much as digits as its factorization.

19372139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10206, while the sum is 35.

The square root of 19372139 is about 4401.3792156550. The cubic root of 19372139 is about 268.5710469745.

The spelling of 19372139 in words is "nineteen million, three hundred seventy-two thousand, one hundred thirty-nine".