138632473 has 12 divisors (see below), whose sum is σ = 162222528. Its totient is φ = 116053560.

The previous prime is 138632449. The next prime is 138632503. The reversal of 138632473 is 374236831.

It is a de Polignac number, because none of the positive numbers 2^k-138632473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138632423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7588 + ... + 18298.

It is an arithmetic number, because the mean of its divisors is an integer number (13518544).

Almost surely, 2^138632473 is an apocalyptic number.

It is an amenable number.

138632473 is a deficient number, since it is larger than the sum of its proper divisors (23590055).

138632473 is an equidigital number, since it uses as much as digits as its factorization.

138632473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10804 (or 10761 counting only the distinct ones).

The product of its digits is 72576, while the sum is 37.

The square root of 138632473 is about 11774.2291892081. The cubic root of 138632473 is about 517.5531904844.

The spelling of 138632473 in words is "one hundred thirty-eight million, six hundred thirty-two thousand, four hundred seventy-three".