135523990 has 16 divisors (see below), whose sum is σ = 278792352. Its totient is φ = 46465344.

The previous prime is 135523967. The next prime is 135524023. The reversal of 135523990 is 99325531.

135523990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 967959 + ... + 968098.

It is an arithmetic number, because the mean of its divisors is an integer number (17424522).

Almost surely, 2^135523990 is an apocalyptic number.

135523990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135523990 is an abundant number, since it is smaller than the sum of its proper divisors (143268362).

135523990 is a wasteful number, since it uses less digits than its factorization.

135523990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1936071.

The product of its (nonzero) digits is 36450, while the sum is 37.

The square root of 135523990 is about 11641.4771399509. The cubic root of 135523990 is about 513.6556384691.

The spelling of 135523990 in words is "one hundred thirty-five million, five hundred twenty-three thousand, nine hundred ninety".