138673363 has 4 divisors (see below), whose sum is σ = 138710880. Its totient is φ = 138635848.

The previous prime is 138673351. The next prime is 138673411. The reversal of 138673363 is 363376831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138673363 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138673963) 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, 12523 + ... + 20836.

It is an arithmetic number, because the mean of its divisors is an integer number (34677720).

Almost surely, 2^138673363 is an apocalyptic number.

138673363 is a deficient number, since it is larger than the sum of its proper divisors (37517).

138673363 is an equidigital number, since it uses as much as digits as its factorization.

138673363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37516.

The product of its digits is 163296, while the sum is 40.

The square root of 138673363 is about 11775.9654805880. The cubic root of 138673363 is about 517.6040700250.

The spelling of 138673363 in words is "one hundred thirty-eight million, six hundred seventy-three thousand, three hundred sixty-three".