138989193 has 8 divisors (see below), whose sum is σ = 211793088. Its totient is φ = 79422384.

The previous prime is 138989189. The next prime is 138989219. The reversal of 138989193 is 391989831.

It is a happy number.

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

It is not a de Polignac number, because 138989193 - 2² = 138989189 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138989113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3309246 + ... + 3309287.

It is an arithmetic number, because the mean of its divisors is an integer number (26474136).

Almost surely, 2^138989193 is an apocalyptic number.

It is an amenable number.

138989193 is a deficient number, since it is larger than the sum of its proper divisors (72803895).

138989193 is an equidigital number, since it uses as much as digits as its factorization.

138989193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6618543.

The product of its digits is 419904, while the sum is 51.

The square root of 138989193 is about 11789.3677947547. The cubic root of 138989193 is about 517.9967216044.

The spelling of 138989193 in words is "one hundred thirty-eight million, nine hundred eighty-nine thousand, one hundred ninety-three".