139318729 has 8 divisors (see below), whose sum is σ = 152212320. Its totient is φ = 126463200.

The previous prime is 139318721. The next prime is 139318741. The reversal of 139318729 is 927813931.

139318729 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 a cyclic number.

It is not a de Polignac number, because 139318729 - 2³ = 139318721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139318721) 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, 1564 + ... + 16765.

It is an arithmetic number, because the mean of its divisors is an integer number (19026540).

Almost surely, 2^139318729 is an apocalyptic number.

It is an amenable number.

139318729 is a deficient number, since it is larger than the sum of its proper divisors (12893591).

139318729 is a wasteful number, since it uses less digits than its factorization.

139318729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19031.

The product of its digits is 81648, while the sum is 43.

The square root of 139318729 is about 11803.3355031533. The cubic root of 139318729 is about 518.4057794014.

The spelling of 139318729 in words is "one hundred thirty-nine million, three hundred eighteen thousand, seven hundred twenty-nine".