1338518173 has 2 divisors, whose sum is σ = 1338518174. Its totient is φ = 1338518172.

The previous prime is 1338518149. The next prime is 1338518183. The reversal of 1338518173 is 3718158331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 677925369 + 660592804 = 26037^2 + 25702^2 .

It is an emirp because it is prime and its reverse (3718158331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1338518173 is a prime.

It is a super-3 number, since 3×1338518173³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1338518183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669259086 + 669259087.

It is an arithmetic number, because the mean of its divisors is an integer number (669259087).

Almost surely, 2^1338518173 is an apocalyptic number.

It is an amenable number.

1338518173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338518173 is an equidigital number, since it uses as much as digits as its factorization.

1338518173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 1338518173 is about 36585.7646223227. The cubic root of 1338518173 is about 1102.0672346421.

The spelling of 1338518173 in words is "one billion, three hundred thirty-eight million, five hundred eighteen thousand, one hundred seventy-three".