135086399 has 4 divisors (see below), whose sum is σ = 154384464. Its totient is φ = 115788336.

The previous prime is 135086381. The next prime is 135086407. The reversal of 135086399 is 993680531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135086399 - 2¹² = 135082303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135086309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9649022 + ... + 9649035.

It is an arithmetic number, because the mean of its divisors is an integer number (38596116).

Almost surely, 2^135086399 is an apocalyptic number.

135086399 is a deficient number, since it is larger than the sum of its proper divisors (19298065).

135086399 is an equidigital number, since it uses as much as digits as its factorization.

135086399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19298064.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 135086399 is about 11622.6674649153. The cubic root of 135086399 is about 513.1021978589.

The spelling of 135086399 in words is "one hundred thirty-five million, eighty-six thousand, three hundred ninety-nine".