138168575 has 6 divisors (see below), whose sum is σ = 171329064. Its totient is φ = 110534840.

The previous prime is 138168517. The next prime is 138168577. The reversal of 138168575 is 575861831.

It is not a de Polignac number, because 138168575 - 2¹² = 138164479 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 (138168577) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2763347 + ... + 2763396.

It is an arithmetic number, because the mean of its divisors is an integer number (28554844).

Almost surely, 2^138168575 is an apocalyptic number.

138168575 is a deficient number, since it is larger than the sum of its proper divisors (33160489).

138168575 is an equidigital number, since it uses as much as digits as its factorization.

138168575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5526753 (or 5526748 counting only the distinct ones).

The product of its digits is 201600, while the sum is 44.

The square root of 138168575 is about 11754.5129631134. The cubic root of 138168575 is about 516.9752590525.

The spelling of 138168575 in words is "one hundred thirty-eight million, one hundred sixty-eight thousand, five hundred seventy-five".