138703789 has 4 divisors (see below), whose sum is σ = 158518624. Its totient is φ = 118888956.

The previous prime is 138703783. The next prime is 138703793. The reversal of 138703789 is 987307831.

It is a happy number.

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 138703789 - 2⁵ = 138703757 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 (138703783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9907407 + ... + 9907420.

It is an arithmetic number, because the mean of its divisors is an integer number (39629656).

Almost surely, 2^138703789 is an apocalyptic number.

It is an amenable number.

138703789 is a deficient number, since it is larger than the sum of its proper divisors (19814835).

138703789 is an equidigital number, since it uses as much as digits as its factorization.

138703789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19814834.

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 138703789 is about 11777.2572783310. The cubic root of 138703789 is about 517.6419226918.

The spelling of 138703789 in words is "one hundred thirty-eight million, seven hundred three thousand, seven hundred eighty-nine".