138317501 has 8 divisors (see below), whose sum is σ = 163528320. Its totient is φ = 114469488.

The previous prime is 138317497. The next prime is 138317513. The reversal of 138317501 is 105713831.

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

It is not a de Polignac number, because 138317501 - 2² = 138317497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138317401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 340481 + ... + 340886.

It is an arithmetic number, because the mean of its divisors is an integer number (20441040).

Almost surely, 2^138317501 is an apocalyptic number.

It is an amenable number.

138317501 is a deficient number, since it is larger than the sum of its proper divisors (25210819).

138317501 is an equidigital number, since it uses as much as digits as its factorization.

138317501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681403.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 138317501 is about 11760.8461005150. The cubic root of 138317501 is about 517.1609342013.

The spelling of 138317501 in words is "one hundred thirty-eight million, three hundred seventeen thousand, five hundred one".