138848739 has 8 divisors (see below), whose sum is σ = 185187072. Its totient is φ = 92538120.

The previous prime is 138848737. The next prime is 138848797. The reversal of 138848739 is 937848831.

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

It is not a de Polignac number, because 138848739 - 2¹ = 138848737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 138848691 and 138848700.

It is not an unprimeable number, because it can be changed into a prime (138848737) 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 7 ways as a sum of consecutive naturals, for example, 12754 + ... + 20984.

It is an arithmetic number, because the mean of its divisors is an integer number (23148384).

Almost surely, 2^138848739 is an apocalyptic number.

138848739 is a deficient number, since it is larger than the sum of its proper divisors (46338333).

138848739 is an equidigital number, since it uses as much as digits as its factorization.

138848739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13857.

The product of its digits is 1161216, while the sum is 51.

The square root of 138848739 is about 11783.4094811307. The cubic root of 138848739 is about 517.8221775004.

The spelling of 138848739 in words is "one hundred thirty-eight million, eight hundred forty-eight thousand, seven hundred thirty-nine".