135601399 has 8 divisors (see below), whose sum is σ = 142283232. Its totient is φ = 128985120.

The previous prime is 135601397. The next prime is 135601429. The reversal of 135601399 is 993106531.

135601399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135601399 - 2¹ = 135601397 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 (135601397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12124 + ... + 20449.

It is an arithmetic number, because the mean of its divisors is an integer number (17785404).

Almost surely, 2^135601399 is an apocalyptic number.

135601399 is a deficient number, since it is larger than the sum of its proper divisors (6681833).

135601399 is a wasteful number, since it uses less digits than its factorization.

135601399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32777.

The product of its (nonzero) digits is 21870, while the sum is 37.

The square root of 135601399 is about 11644.8013722863. The cubic root of 135601399 is about 513.7534169789.

The spelling of 135601399 in words is "one hundred thirty-five million, six hundred one thousand, three hundred ninety-nine".