138973092 has 12 divisors (see below), whose sum is σ = 324270576. Its totient is φ = 46324360.

The previous prime is 138973091. The next prime is 138973097. The reversal of 138973092 is 290379831.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (138973091) 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, 5790534 + ... + 5790557.

It is an arithmetic number, because the mean of its divisors is an integer number (27022548).

Almost surely, 2^138973092 is an apocalyptic number.

138973092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138973092 is an abundant number, since it is smaller than the sum of its proper divisors (185297484).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

138973092 is a wasteful number, since it uses less digits than its factorization.

138973092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11581098 (or 11581096 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 138973092 is about 11788.6849139334. The cubic root of 138973092 is about 517.9767186408.

The spelling of 138973092 in words is "one hundred thirty-eight million, nine hundred seventy-three thousand, ninety-two".