135404573 has 2 divisors, whose sum is σ = 135404574. Its totient is φ = 135404572.

The previous prime is 135404557. The next prime is 135404579. The reversal of 135404573 is 375404531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131492089 + 3912484 = 11467^2 + 1978^2 .

It is an emirp because it is prime and its reverse (375404531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135404573 - 2⁴ = 135404557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135404579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67702286 + 67702287.

It is an arithmetic number, because the mean of its divisors is an integer number (67702287).

Almost surely, 2^135404573 is an apocalyptic number.

It is an amenable number.

135404573 is a deficient number, since it is larger than the sum of its proper divisors (1).

135404573 is an equidigital number, since it uses as much as digits as its factorization.

135404573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 135404573 is about 11636.3470642638. The cubic root of 135404573 is about 513.5047248669.

The spelling of 135404573 in words is "one hundred thirty-five million, four hundred four thousand, five hundred seventy-three".