138573643 has 8 divisors (see below), whose sum is σ = 155721888. Its totient is φ = 122352384.

The previous prime is 138573619. The next prime is 138573653. The reversal of 138573643 is 346375831.

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

It is a cyclic number.

It is not a de Polignac number, because 138573643 - 2²¹ = 136476491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138573596 and 138573605.

It is not an unprimeable number, because it can be changed into a prime (138573653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231430 + ... + 232027.

It is an arithmetic number, because the mean of its divisors is an integer number (19465236).

Almost surely, 2^138573643 is an apocalyptic number.

138573643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138573643 is a deficient number, since it is larger than the sum of its proper divisors (17148245).

138573643 is a wasteful number, since it uses less digits than its factorization.

138573643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463493.

The product of its digits is 181440, while the sum is 40.

The square root of 138573643 is about 11771.7306714009. The cubic root of 138573643 is about 517.4799705971.

The spelling of 138573643 in words is "one hundred thirty-eight million, five hundred seventy-three thousand, six hundred forty-three".