135420139 has 2 divisors, whose sum is σ = 135420140. Its totient is φ = 135420138.

The previous prime is 135420137. The next prime is 135420149. The reversal of 135420139 is 931024531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135420139 - 2¹ = 135420137 is a prime.

It is a super-2 number, since 2×135420139² = 36677228093558642, which contains 22 as substring.

Together with 135420137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (135420137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67710069 + 67710070.

It is an arithmetic number, because the mean of its divisors is an integer number (67710070).

Almost surely, 2^135420139 is an apocalyptic number.

135420139 is a deficient number, since it is larger than the sum of its proper divisors (1).

135420139 is an equidigital number, since it uses as much as digits as its factorization.

135420139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 135420139 is about 11637.0158975572. The cubic root of 135420139 is about 513.5244014753.

The spelling of 135420139 in words is "one hundred thirty-five million, four hundred twenty thousand, one hundred thirty-nine".