138617351 has 8 divisors (see below), whose sum is σ = 142354800. Its totient is φ = 134896960.

The previous prime is 138617321. The next prime is 138617359. The reversal of 138617351 is 153716831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138617351 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 (138617359) 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, 13145 + ... + 21213.

It is an arithmetic number, because the mean of its divisors is an integer number (17794350).

Almost surely, 2^138617351 is an apocalyptic number.

138617351 is a deficient number, since it is larger than the sum of its proper divisors (3737449).

138617351 is an equidigital number, since it uses as much as digits as its factorization.

138617351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8529.

The product of its digits is 15120, while the sum is 35.

The square root of 138617351 is about 11773.5870065159. The cubic root of 138617351 is about 517.5343716036.

It can be divided in two parts, 13861 and 7351, that added together give a palindrome (21212).

The spelling of 138617351 in words is "one hundred thirty-eight million, six hundred seventeen thousand, three hundred fifty-one".