138166735 has 32 divisors (see below), whose sum is σ = 203444352. Its totient is φ = 87920640.

The previous prime is 138166733. The next prime is 138166741. The reversal of 138166735 is 537661831.

It is a happy number.

It is not a de Polignac number, because 138166735 - 2¹ = 138166733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138166733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41845 + ... + 45025.

It is an arithmetic number, because the mean of its divisors is an integer number (6357636).

Almost surely, 2^138166735 is an apocalyptic number.

138166735 is a deficient number, since it is larger than the sum of its proper divisors (65277617).

138166735 is a wasteful number, since it uses less digits than its factorization.

138166735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3283.

The product of its digits is 90720, while the sum is 40.

The square root of 138166735 is about 11754.4346950417. The cubic root of 138166735 is about 516.9729641778.

The spelling of 138166735 in words is "one hundred thirty-eight million, one hundred sixty-six thousand, seven hundred thirty-five".