139739047 has 8 divisors (see below), whose sum is σ = 164018336. Its totient is φ = 116538912.

The previous prime is 139739011. The next prime is 139739051. The reversal of 139739047 is 740937931.

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

It is not a de Polignac number, because 139739047 - 2¹⁵ = 139706279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139738994 and 139739012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139739057) 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, 269508 + ... + 270025.

It is an arithmetic number, because the mean of its divisors is an integer number (20502292).

Almost surely, 2^139739047 is an apocalyptic number.

139739047 is a deficient number, since it is larger than the sum of its proper divisors (24279289).

139739047 is an equidigital number, since it uses as much as digits as its factorization.

139739047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539577.

The product of its (nonzero) digits is 142884, while the sum is 43.

The square root of 139739047 is about 11821.1271459197. The cubic root of 139739047 is about 518.9265912164.

The spelling of 139739047 in words is "one hundred thirty-nine million, seven hundred thirty-nine thousand, forty-seven".