138672941 has 4 divisors (see below), whose sum is σ = 151279584. Its totient is φ = 126066300.

The previous prime is 138672931. The next prime is 138672943. The reversal of 138672941 is 149276831.

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 138672941 - 2¹⁰ = 138671917 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 (138672943) 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, 6303305 + ... + 6303326.

It is an arithmetic number, because the mean of its divisors is an integer number (37819896).

Almost surely, 2^138672941 is an apocalyptic number.

138672941 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

138672941 is a deficient number, since it is larger than the sum of its proper divisors (12606643).

138672941 is a wasteful number, since it uses less digits than its factorization.

138672941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12606642.

The product of its digits is 72576, while the sum is 41.

The square root of 138672941 is about 11775.9475627229. The cubic root of 138672941 is about 517.6035449803.

The spelling of 138672941 in words is "one hundred thirty-eight million, six hundred seventy-two thousand, nine hundred forty-one".