138046393 has 4 divisors (see below), whose sum is σ = 138250980. Its totient is φ = 137841808.

The previous prime is 138046367. The next prime is 138046421. The reversal of 138046393 is 393640831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 112614544 + 25431849 = 10612^2 + 5043^2 .

It is a cyclic number.

It is not a de Polignac number, because 138046393 - 2⁵ = 138046361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138046693) 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, 101278 + ... + 102631.

It is an arithmetic number, because the mean of its divisors is an integer number (34562745).

Almost surely, 2^138046393 is an apocalyptic number.

It is an amenable number.

138046393 is a deficient number, since it is larger than the sum of its proper divisors (204587).

138046393 is an equidigital number, since it uses as much as digits as its factorization.

138046393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204586.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 138046393 is about 11749.3145757529. The cubic root of 138046393 is about 516.8228276255.

The spelling of 138046393 in words is "one hundred thirty-eight million, forty-six thousand, three hundred ninety-three".