138945413 has 8 divisors (see below), whose sum is σ = 141496800. Its totient is φ = 136400688.

The previous prime is 138945371. The next prime is 138945431. The reversal of 138945413 is 314549831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138945413 - 2¹⁰ = 138944389 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 (138945463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61970 + ... + 64172.

It is an arithmetic number, because the mean of its divisors is an integer number (17687100).

Almost surely, 2^138945413 is an apocalyptic number.

It is an amenable number.

138945413 is a deficient number, since it is larger than the sum of its proper divisors (2551387).

138945413 is a wasteful number, since it uses less digits than its factorization.

138945413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3331.

The product of its digits is 51840, while the sum is 38.

The square root of 138945413 is about 11787.5108907691. The cubic root of 138945413 is about 517.9423282195.

The spelling of 138945413 in words is "one hundred thirty-eight million, nine hundred forty-five thousand, four hundred thirteen".