135193990 has 16 divisors (see below), whose sum is σ = 247941648. Its totient is φ = 53057056.

The previous prime is 135193909. The next prime is 135193997. The reversal of 135193990 is 99391531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135193997) 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, 127012 + ... + 128071.

It is an arithmetic number, because the mean of its divisors is an integer number (15496353).

Almost surely, 2^135193990 is an apocalyptic number.

135193990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135193990 is a deficient number, since it is larger than the sum of its proper divisors (112747658).

135193990 is a wasteful number, since it uses less digits than its factorization.

135193990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255143.

The product of its (nonzero) digits is 32805, while the sum is 40.

The square root of 135193990 is about 11627.2950422701. The cubic root of 135193990 is about 513.2383836117.

The spelling of 135193990 in words is "one hundred thirty-five million, one hundred ninety-three thousand, nine hundred ninety".