135638943 has 12 divisors (see below), whose sum is σ = 198788184. Its totient is φ = 82205200.

The previous prime is 135638941. The next prime is 135638957. The reversal of 135638943 is 349836531.

It is not a de Polignac number, because 135638943 - 2¹ = 135638941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135638895 and 135638904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135638941) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186468 + ... + 187193.

It is an arithmetic number, because the mean of its divisors is an integer number (16565682).

Almost surely, 2^135638943 is an apocalyptic number.

135638943 is a deficient number, since it is larger than the sum of its proper divisors (63149241).

135638943 is a wasteful number, since it uses less digits than its factorization.

135638943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373686 (or 373675 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The square root of 135638943 is about 11646.4133105433. The cubic root of 135638943 is about 513.8008269579.

The spelling of 135638943 in words is "one hundred thirty-five million, six hundred thirty-eight thousand, nine hundred forty-three".