138131601 has 8 divisors (see below), whose sum is σ = 184229760. Its totient is φ = 92060592.

The previous prime is 138131599. The next prime is 138131639. The reversal of 138131601 is 106131831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138131601 - 2¹ = 138131599 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (138131401) 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 7 ways as a sum of consecutive naturals, for example, 16696 + ... + 23558.

It is an arithmetic number, because the mean of its divisors is an integer number (23028720).

Almost surely, 2^138131601 is an apocalyptic number.

It is an amenable number.

138131601 is a deficient number, since it is larger than the sum of its proper divisors (46098159).

138131601 is an equidigital number, since it uses as much as digits as its factorization.

138131601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13575.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 138131601 is about 11752.9401002473. The cubic root of 138131601 is about 516.9291406339.

The spelling of 138131601 in words is "one hundred thirty-eight million, one hundred thirty-one thousand, six hundred one".