135481994 has 8 divisors (see below), whose sum is σ = 203279328. Its totient is φ = 67722220.

The previous prime is 135481991. The next prime is 135482021. The reversal of 135481994 is 499184531.

135481994 is digitally balanced in base 3, 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 not an unprimeable number, because it can be changed into a prime (135481991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2789 + ... + 16695.

It is an arithmetic number, because the mean of its divisors is an integer number (25409916).

Almost surely, 2^135481994 is an apocalyptic number.

135481994 is a deficient number, since it is larger than the sum of its proper divisors (67797334).

135481994 is a wasteful number, since it uses less digits than its factorization.

135481994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18780.

The product of its digits is 155520, while the sum is 44.

The square root of 135481994 is about 11639.6732772016. The cubic root of 135481994 is about 513.6025760046.

The spelling of 135481994 in words is "one hundred thirty-five million, four hundred eighty-one thousand, nine hundred ninety-four".