138632073 has 4 divisors (see below), whose sum is σ = 184842768. Its totient is φ = 92421380.

The previous prime is 138632051. The next prime is 138632083. The reversal of 138632073 is 370236831.

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 138632073 - 2⁵ = 138632041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138632023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23105343 + ... + 23105348.

It is an arithmetic number, because the mean of its divisors is an integer number (46210692).

Almost surely, 2^138632073 is an apocalyptic number.

It is an amenable number.

138632073 is a deficient number, since it is larger than the sum of its proper divisors (46210695).

138632073 is an equidigital number, since it uses as much as digits as its factorization.

138632073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46210694.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 138632073 is about 11774.2122029459. The cubic root of 138632073 is about 517.5526927139.

The spelling of 138632073 in words is "one hundred thirty-eight million, six hundred thirty-two thousand, seventy-three".