135999992 has 8 divisors (see below), whose sum is σ = 255000000. Its totient is φ = 67999992.

The previous prime is 135999991. The next prime is 136000021. The reversal of 135999992 is 299999531.

135999992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135999991) 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 as a sum of consecutive naturals, namely, 8499992 + ... + 8500007.

It is an arithmetic number, because the mean of its divisors is an integer number (31875000).

Almost surely, 2^135999992 is an apocalyptic number.

It is an amenable number.

135999992 is a deficient number, since it is larger than the sum of its proper divisors (119000008).

135999992 is a wasteful number, since it uses less digits than its factorization.

135999992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17000005 (or 17000001 counting only the distinct ones).

The product of its digits is 1771470, while the sum is 56.

The square root of 135999992 is about 11661.9034466934. The cubic root of 135999992 is about 514.2563080482.

The spelling of 135999992 in words is "one hundred thirty-five million, nine hundred ninety-nine thousand, nine hundred ninety-two".