135697278 has 64 divisors (see below), whose sum is σ = 299427840. Its totient is φ = 40839552.

The previous prime is 135697271. The next prime is 135697279. The reversal of 135697278 is 872796531.

135697278 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 not an unprimeable number, because it can be changed into a prime (135697271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 223251 + ... + 223857.

It is an arithmetic number, because the mean of its divisors is an integer number (4678560).

Almost surely, 2^135697278 is an apocalyptic number.

135697278 is an abundant number, since it is smaller than the sum of its proper divisors (163730562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135697278 is a wasteful number, since it uses less digits than its factorization.

135697278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721.

The product of its digits is 635040, while the sum is 48.

The square root of 135697278 is about 11648.9174604338. The cubic root of 135697278 is about 513.8744741342.

The spelling of 135697278 in words is "one hundred thirty-five million, six hundred ninety-seven thousand, two hundred seventy-eight".