135723138 has 32 divisors (see below), whose sum is σ = 299915136. Its totient is φ = 40727808.

The previous prime is 135723113. The next prime is 135723139. The reversal of 135723138 is 831327531.

It is a junction number, because it is equal to n+sod(n) for n = 135723099 and 135723108.

It is not an unprimeable number, because it can be changed into a prime (135723139) 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 15 ways as a sum of consecutive naturals, for example, 26581 + ... + 31272.

It is an arithmetic number, because the mean of its divisors is an integer number (9372348).

Almost surely, 2^135723138 is an apocalyptic number.

135723138 is an abundant number, since it is smaller than the sum of its proper divisors (164191998).

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

135723138 is a wasteful number, since it uses less digits than its factorization.

135723138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57898.

The product of its digits is 15120, while the sum is 33.

The square root of 135723138 is about 11650.0273819421. The cubic root of 135723138 is about 513.9071152946.

The spelling of 135723138 in words is "one hundred thirty-five million, seven hundred twenty-three thousand, one hundred thirty-eight".