138763093 has 4 divisors (see below), whose sum is σ = 158586400. Its totient is φ = 118939788.

The previous prime is 138763033. The next prime is 138763109. The reversal of 138763093 is 390367831.

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, and also an emirpimes, since its reverse is a distinct semiprime: 390367831 = 7 ⋅55766833.

It is a cyclic number.

It is not a de Polignac number, because 138763093 - 2⁹ = 138762581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138763033) 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 3 ways as a sum of consecutive naturals, for example, 9911643 + ... + 9911656.

It is an arithmetic number, because the mean of its divisors is an integer number (39646600).

Almost surely, 2^138763093 is an apocalyptic number.

It is an amenable number.

138763093 is a deficient number, since it is larger than the sum of its proper divisors (19823307).

138763093 is an equidigital number, since it uses as much as digits as its factorization.

138763093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19823306.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 138763093 is about 11779.7747431774. The cubic root of 138763093 is about 517.7156862679.

The spelling of 138763093 in words is "one hundred thirty-eight million, seven hundred sixty-three thousand, ninety-three".