135185990 has 16 divisors (see below), whose sum is σ = 245845152. Its totient is φ = 53516544.

The previous prime is 135185977. The next prime is 135185993. The reversal of 135185990 is 99581531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135185993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68714 + ... + 70653.

It is an arithmetic number, because the mean of its divisors is an integer number (15365322).

Almost surely, 2^135185990 is an apocalyptic number.

135185990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135185990 is a deficient number, since it is larger than the sum of its proper divisors (110659162).

135185990 is a wasteful number, since it uses less digits than its factorization.

135185990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139471.

The product of its (nonzero) digits is 48600, while the sum is 41.

The square root of 135185990 is about 11626.9510190763. The cubic root of 135185990 is about 513.2282599169.

The spelling of 135185990 in words is "one hundred thirty-five million, one hundred eighty-five thousand, nine hundred ninety".