138944683 has 4 divisors (see below), whose sum is σ = 139338648. Its totient is φ = 138550720.

The previous prime is 138944677. The next prime is 138944693. The reversal of 138944683 is 386449831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138944683 - 2¹⁷ = 138813611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138944693) 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, 196453 + ... + 197158.

It is an arithmetic number, because the mean of its divisors is an integer number (34834662).

Almost surely, 2^138944683 is an apocalyptic number.

138944683 is a deficient number, since it is larger than the sum of its proper divisors (393965).

138944683 is an equidigital number, since it uses as much as digits as its factorization.

138944683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393964.

The product of its digits is 497664, while the sum is 46.

The square root of 138944683 is about 11787.4799257517. The cubic root of 138944683 is about 517.9414211521.

The spelling of 138944683 in words is "one hundred thirty-eight million, nine hundred forty-four thousand, six hundred eighty-three".