138001475 has 6 divisors (see below), whose sum is σ = 171121860. Its totient is φ = 110401160.

The previous prime is 138001471. The next prime is 138001481. The reversal of 138001475 is 574100831.

It is not a de Polignac number, because 138001475 - 2² = 138001471 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138001471) 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 5 ways as a sum of consecutive naturals, for example, 2760005 + ... + 2760054.

It is an arithmetic number, because the mean of its divisors is an integer number (28520310).

Almost surely, 2^138001475 is an apocalyptic number.

138001475 is a deficient number, since it is larger than the sum of its proper divisors (33120385).

138001475 is an equidigital number, since it uses as much as digits as its factorization.

138001475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5520069 (or 5520064 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 138001475 is about 11747.4029044721. The cubic root of 138001475 is about 516.7667663609.

The spelling of 138001475 in words is "one hundred thirty-eight million, one thousand, four hundred seventy-five".