135440579 has 2 divisors, whose sum is σ = 135440580. Its totient is φ = 135440578.

The previous prime is 135440573. The next prime is 135440587. The reversal of 135440579 is 975044531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135440579 - 2⁴ = 135440563 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (135440573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67720289 + 67720290.

It is an arithmetic number, because the mean of its divisors is an integer number (67720290).

Almost surely, 2^135440579 is an apocalyptic number.

135440579 is a deficient number, since it is larger than the sum of its proper divisors (1).

135440579 is an equidigital number, since it uses as much as digits as its factorization.

135440579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 135440579 is about 11637.8940964420. The cubic root of 135440579 is about 513.5502369007.

The spelling of 135440579 in words is "one hundred thirty-five million, four hundred forty thousand, five hundred seventy-nine".