135398399 has 4 divisors (see below), whose sum is σ = 138279264. Its totient is φ = 132517536.

The previous prime is 135398381. The next prime is 135398413. The reversal of 135398399 is 993893531.

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 135398399 - 2⁸ = 135398143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135398339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1440362 + ... + 1440455.

It is an arithmetic number, because the mean of its divisors is an integer number (34569816).

Almost surely, 2^135398399 is an apocalyptic number.

135398399 is a deficient number, since it is larger than the sum of its proper divisors (2880865).

135398399 is an equidigital number, since it uses as much as digits as its factorization.

135398399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880864.

The product of its digits is 787320, while the sum is 50.

The square root of 135398399 is about 11636.0817717993. The cubic root of 135398399 is about 513.4969200435.

The spelling of 135398399 in words is "one hundred thirty-five million, three hundred ninety-eight thousand, three hundred ninety-nine".