135897291 has 32 divisors (see below), whose sum is σ = 214188800. Its totient is φ = 84913920.

The previous prime is 135897259. The next prime is 135897313. The reversal of 135897291 is 192798531.

135897291 is a `hidden beast` number, since 1 + 358 + 9 + 7 + 291 = 666.

It is not a de Polignac number, because 135897291 - 2⁵ = 135897259 is a prime.

It is a super-2 number, since 2×135897291² = 36936147402277362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135897221) 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 31 ways as a sum of consecutive naturals, for example, 48396 + ... + 51126.

It is an arithmetic number, because the mean of its divisors is an integer number (6693400).

Almost surely, 2^135897291 is an apocalyptic number.

135897291 is a deficient number, since it is larger than the sum of its proper divisors (78291509).

135897291 is a wasteful number, since it uses less digits than its factorization.

135897291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856 (or 2850 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 135897291 is about 11657.4993459146. The cubic root of 135897291 is about 514.1268278026.

The spelling of 135897291 in words is "one hundred thirty-five million, eight hundred ninety-seven thousand, two hundred ninety-one".