19744129 has 2 divisors, whose sum is σ = 19744130. Its totient is φ = 19744128.

The previous prime is 19744121. The next prime is 19744133. The reversal of 19744129 is 92144791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14837904 + 4906225 = 3852^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 19744129 - 2³ = 19744121 is a prime.

It is not a weakly prime, because it can be changed into another prime (19744121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9872064 + 9872065.

It is an arithmetic number, because the mean of its divisors is an integer number (9872065).

Almost surely, 2^19744129 is an apocalyptic number.

It is an amenable number.

19744129 is a deficient number, since it is larger than the sum of its proper divisors (1).

19744129 is an equidigital number, since it uses as much as digits as its factorization.

19744129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 19744129 is about 4443.4366204549. The cubic root of 19744129 is about 270.2792218870.

The spelling of 19744129 in words is "nineteen million, seven hundred forty-four thousand, one hundred twenty-nine".