135400129 has 2 divisors, whose sum is σ = 135400130. Its totient is φ = 135400128.

The previous prime is 135400073. The next prime is 135400147. The reversal of 135400129 is 921004531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124277904 + 11122225 = 11148^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 135400129 - 2⁹ = 135399617 is a prime.

It is not a weakly prime, because it can be changed into another prime (135400229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67700064 + 67700065.

It is an arithmetic number, because the mean of its divisors is an integer number (67700065).

Almost surely, 2^135400129 is an apocalyptic number.

It is an amenable number.

135400129 is a deficient number, since it is larger than the sum of its proper divisors (1).

135400129 is an equidigital number, since it uses as much as digits as its factorization.

135400129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 135400129 is about 11636.1561093000. The cubic root of 135400129 is about 513.4991070361.

The spelling of 135400129 in words is "one hundred thirty-five million, four hundred thousand, one hundred twenty-nine".