135971764 has 12 divisors (see below), whose sum is σ = 239159844. Its totient is φ = 67640384.

The previous prime is 135971747. The next prime is 135971777. The reversal of 135971764 is 467179531.

It can be written as a sum of positive squares in 2 ways, for example, as 130644900 + 5326864 = 11430^2 + 2308^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 135971764.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85489 + ... + 87064.

It is an arithmetic number, because the mean of its divisors is an integer number (19929987).

Almost surely, 2^135971764 is an apocalyptic number.

It is an amenable number.

135971764 is a deficient number, since it is larger than the sum of its proper divisors (103188080).

135971764 is a wasteful number, since it uses less digits than its factorization.

135971764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172754 (or 172752 counting only the distinct ones).

The product of its digits is 158760, while the sum is 43.

The square root of 135971764 is about 11660.6931183356. The cubic root of 135971764 is about 514.2207261061.

The spelling of 135971764 in words is "one hundred thirty-five million, nine hundred seventy-one thousand, seven hundred sixty-four".