135897290 has 16 divisors (see below), whose sum is σ = 244803168. Its totient is φ = 54317136.

The previous prime is 135897259. The next prime is 135897313. The reversal of 135897290 is 92798531.

It is a Curzon 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, 10769 + ... + 19691.

It is an arithmetic number, because the mean of its divisors is an integer number (15300198).

Almost surely, 2^135897290 is an apocalyptic number.

135897290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

135897290 is a deficient number, since it is larger than the sum of its proper divisors (108905878).

135897290 is a wasteful number, since it uses less digits than its factorization.

135897290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10453.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 135897290 is about 11657.4993030238. The cubic root of 135897290 is about 514.1268265416.

The spelling of 135897290 in words is "one hundred thirty-five million, eight hundred ninety-seven thousand, two hundred ninety".