139729039 has 4 divisors (see below), whose sum is σ = 139764456. Its totient is φ = 139693624.

The previous prime is 139729033. The next prime is 139729043. The reversal of 139729039 is 930927931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930927931 = 71 ⋅13111661.

It is a cyclic number.

It is not a de Polignac number, because 139729039 - 2²¹ = 137631887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139728986 and 139729004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139729033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10924 + ... + 19969.

It is an arithmetic number, because the mean of its divisors is an integer number (34941114).

Almost surely, 2^139729039 is an apocalyptic number.

139729039 is a deficient number, since it is larger than the sum of its proper divisors (35417).

139729039 is an equidigital number, since it uses as much as digits as its factorization.

139729039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35416.

The product of its (nonzero) digits is 91854, while the sum is 43.

The square root of 139729039 is about 11820.7038284529. The cubic root of 139729039 is about 518.9142025500.

The spelling of 139729039 in words is "one hundred thirty-nine million, seven hundred twenty-nine thousand, thirty-nine".