19142399 has 2 divisors, whose sum is σ = 19142400. Its totient is φ = 19142398.

The previous prime is 19142393. The next prime is 19142401. The reversal of 19142399 is 99324191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19142399 is a prime.

Together with 19142401, 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 (19142393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9571199 + 9571200.

It is an arithmetic number, because the mean of its divisors is an integer number (9571200).

Almost surely, 2^19142399 is an apocalyptic number.

19142399 is a deficient number, since it is larger than the sum of its proper divisors (1).

19142399 is an equidigital number, since it uses as much as digits as its factorization.

19142399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 38.

The square root of 19142399 is about 4375.2027381597. The cubic root of 19142399 is about 267.5051339743.

The spelling of 19142399 in words is "nineteen million, one hundred forty-two thousand, three hundred ninety-nine".