135744019 has 2 divisors, whose sum is σ = 135744020. Its totient is φ = 135744018.

The previous prime is 135743981. The next prime is 135744043. The reversal of 135744019 is 910447531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135744019 is a prime.

It is a super-2 number, since 2×135744019² = 36852877388544722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (135744079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67872009 + 67872010.

It is an arithmetic number, because the mean of its divisors is an integer number (67872010).

Almost surely, 2^135744019 is an apocalyptic number.

135744019 is a deficient number, since it is larger than the sum of its proper divisors (1).

135744019 is an equidigital number, since it uses as much as digits as its factorization.

135744019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 135744019 is about 11650.9235256266. The cubic root of 135744019 is about 513.9334688070.

The spelling of 135744019 in words is "one hundred thirty-five million, seven hundred forty-four thousand, nineteen".