19429 has 2 divisors, whose sum is σ = 19430. Its totient is φ = 19428.

The previous prime is 19427. The next prime is 19433. The reversal of 19429 is 92491.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10404 + 9025 = 102^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 19429 - 2¹ = 19427 is a prime.

Together with 19427, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714 + 9715.

It is an arithmetic number, because the mean of its divisors is an integer number (9715).

2¹⁹⁴²⁹ is an apocalyptic number.

It is an amenable number.

19429 is a deficient number, since it is larger than the sum of its proper divisors (1).

19429 is an equidigital number, since it uses as much as digits as its factorization.

19429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 25.

The square root of 19429 is about 139.3879478291. The cubic root of 19429 is about 26.8833559739.

Subtracting from 19429 its product of digits (648), we obtain a palindrome (18781).

The spelling of 19429 in words is "nineteen thousand, four hundred twenty-nine".