138973093 has 24 divisors (see below), whose sum is σ = 166951104. Its totient is φ = 113296320.

The previous prime is 138973091. The next prime is 138973097. The reversal of 138973093 is 390379831.

It is not a de Polignac number, because 138973093 - 2¹ = 138973091 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 (138973091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490930 + ... + 491212.

It is an arithmetic number, because the mean of its divisors is an integer number (6956296).

Almost surely, 2^138973093 is an apocalyptic number.

It is an amenable number.

138973093 is a deficient number, since it is larger than the sum of its proper divisors (27978011).

138973093 is an equidigital number, since it uses as much as digits as its factorization.

138973093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 394 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 138973093 is about 11788.6849563469. The cubic root of 138973093 is about 517.9767198832.

The spelling of 138973093 in words is "one hundred thirty-eight million, nine hundred seventy-three thousand, ninety-three".