135855859 has 2 divisors, whose sum is σ = 135855860. Its totient is φ = 135855858.

The previous prime is 135855829. The next prime is 135855883. The reversal of 135855859 is 958558531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135855859 - 2¹⁹ = 135331571 is a prime.

It is not a weakly prime, because it can be changed into another prime (135855829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67927929 + 67927930.

It is an arithmetic number, because the mean of its divisors is an integer number (67927930).

Almost surely, 2^135855859 is an apocalyptic number.

135855859 is a deficient number, since it is larger than the sum of its proper divisors (1).

135855859 is an equidigital number, since it uses as much as digits as its factorization.

135855859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080000, while the sum is 49.

The square root of 135855859 is about 11655.7221569493. The cubic root of 135855859 is about 514.0745739578.

The spelling of 135855859 in words is "one hundred thirty-five million, eight hundred fifty-five thousand, eight hundred fifty-nine".