138165008 has 10 divisors (see below), whose sum is σ = 267694734. Its totient is φ = 69082496.

The previous prime is 138164969. The next prime is 138165023. The reversal of 138165008 is 800561831.

It can be written as a sum of positive squares in only one way, i.e., 114233344 + 23931664 = 10688^2 + 4892^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4317641 + ... + 4317672.

Almost surely, 2^138165008 is an apocalyptic number.

It is an amenable number.

138165008 is a deficient number, since it is larger than the sum of its proper divisors (129529726).

138165008 is an equidigital number, since it uses as much as digits as its factorization.

138165008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8635321 (or 8635315 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 138165008 is about 11754.3612331764. The cubic root of 138165008 is about 516.9708102198.

The spelling of 138165008 in words is "one hundred thirty-eight million, one hundred sixty-five thousand, eight".