138498317 has 4 divisors (see below), whose sum is σ = 138566400. Its totient is φ = 138430236.

The previous prime is 138498307. The next prime is 138498323. The reversal of 138498317 is 713894831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138498317 - 2¹² = 138494221 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 (138498307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30893 + ... + 35090.

It is an arithmetic number, because the mean of its divisors is an integer number (34641600).

Almost surely, 2^138498317 is an apocalyptic number.

It is an amenable number.

138498317 is a deficient number, since it is larger than the sum of its proper divisors (68083).

138498317 is an equidigital number, since it uses as much as digits as its factorization.

138498317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68082.

The product of its digits is 145152, while the sum is 44.

The square root of 138498317 is about 11768.5307919043. The cubic root of 138498317 is about 517.3861895085.

The spelling of 138498317 in words is "one hundred thirty-eight million, four hundred ninety-eight thousand, three hundred seventeen".