139339749 has 8 divisors (see below), whose sum is σ = 195564640. Its totient is φ = 88004016.

The previous prime is 139339741. The next prime is 139339763. The reversal of 139339749 is 947933931.

139339749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 139339749 - 2³ = 139339741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139339698 and 139339707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139339741) 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, 1222222 + ... + 1222335.

It is an arithmetic number, because the mean of its divisors is an integer number (24445580).

Almost surely, 2^139339749 is an apocalyptic number.

139339749 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

139339749 is a deficient number, since it is larger than the sum of its proper divisors (56224891).

139339749 is a wasteful number, since it uses less digits than its factorization.

139339749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444579.

The product of its digits is 551124, while the sum is 48.

The square root of 139339749 is about 11804.2258958392. The cubic root of 139339749 is about 518.4318499367.

The spelling of 139339749 in words is "one hundred thirty-nine million, three hundred thirty-nine thousand, seven hundred forty-nine".