138458293 has 4 divisors (see below), whose sum is σ = 138876928. Its totient is φ = 138039660.

The previous prime is 138458291. The next prime is 138458311. The reversal of 138458293 is 392854831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 138458293 - 2¹ = 138458291 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138458291) 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 3 ways as a sum of consecutive naturals, for example, 208821 + ... + 209482.

It is an arithmetic number, because the mean of its divisors is an integer number (34719232).

Almost surely, 2^138458293 is an apocalyptic number.

It is an amenable number.

138458293 is a deficient number, since it is larger than the sum of its proper divisors (418635).

138458293 is an equidigital number, since it uses as much as digits as its factorization.

138458293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418634.

The product of its digits is 207360, while the sum is 43.

The square root of 138458293 is about 11766.8302018853. The cubic root of 138458293 is about 517.3363456780.

The spelling of 138458293 in words is "one hundred thirty-eight million, four hundred fifty-eight thousand, two hundred ninety-three".