139529729 has 8 divisors (see below), whose sum is σ = 145071360. Its totient is φ = 134053200.

The previous prime is 139529717. The next prime is 139529773. The reversal of 139529729 is 927925931.

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 139529729 - 2⁸ = 139529473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139529779) 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, 11882 + ... + 20499.

It is an arithmetic number, because the mean of its divisors is an integer number (18133920).

Almost surely, 2^139529729 is an apocalyptic number.

It is an amenable number.

139529729 is a deficient number, since it is larger than the sum of its proper divisors (5541631).

139529729 is a wasteful number, since it uses less digits than its factorization.

139529729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32551.

The product of its digits is 306180, while the sum is 47.

The square root of 139529729 is about 11812.2702728984. The cubic root of 139529729 is about 518.6673581226.

The spelling of 139529729 in words is "one hundred thirty-nine million, five hundred twenty-nine thousand, seven hundred twenty-nine".