135939019 has 2 divisors, whose sum is σ = 135939020. Its totient is φ = 135939018.

The previous prime is 135939017. The next prime is 135939059. The reversal of 135939019 is 910939531.

It is an a-pointer prime, because the next prime (135939059) can be obtained adding 135939019 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135939019 - 2¹ = 135939017 is a prime.

It is a super-2 number, since 2×135939019² = 36958833773364722, which contains 22 as substring.

Together with 135939017, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135939017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67969509 + 67969510.

It is an arithmetic number, because the mean of its divisors is an integer number (67969510).

Almost surely, 2^135939019 is an apocalyptic number.

135939019 is a deficient number, since it is larger than the sum of its proper divisors (1).

135939019 is an equidigital number, since it uses as much as digits as its factorization.

135939019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32805, while the sum is 40.

The square root of 135939019 is about 11659.2889577367. The cubic root of 135939019 is about 514.1794442276.

The spelling of 135939019 in words is "one hundred thirty-five million, nine hundred thirty-nine thousand, nineteen".