135407557 has 2 divisors, whose sum is σ = 135407558. Its totient is φ = 135407556.

The previous prime is 135407551. The next prime is 135407563. The reversal of 135407557 is 755704531.

It is a balanced prime because it is at equal distance from previous prime (135407551) and next prime (135407563).

It can be written as a sum of positive squares in only one way, i.e., 129026881 + 6380676 = 11359^2 + 2526^2 .

It is an emirp because it is prime and its reverse (755704531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135407557 - 2³ = 135407549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135407551) 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, 67703778 + 67703779.

It is an arithmetic number, because the mean of its divisors is an integer number (67703779).

Almost surely, 2^135407557 is an apocalyptic number.

It is an amenable number.

135407557 is a deficient number, since it is larger than the sum of its proper divisors (1).

135407557 is an equidigital number, since it uses as much as digits as its factorization.

135407557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73500, while the sum is 37.

The square root of 135407557 is about 11636.4752824900. The cubic root of 135407557 is about 513.5084969868.

The spelling of 135407557 in words is "one hundred thirty-five million, four hundred seven thousand, five hundred fifty-seven".