139609729 has 8 divisors (see below), whose sum is σ = 168939648. Its totient is φ = 112626240.

The previous prime is 139609727. The next prime is 139609733. The reversal of 139609729 is 927906931.

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 139609729 - 2¹ = 139609727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139609727) 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, 586477 + ... + 586714.

It is an arithmetic number, because the mean of its divisors is an integer number (21117456).

Almost surely, 2^139609729 is an apocalyptic number.

It is an amenable number.

139609729 is a deficient number, since it is larger than the sum of its proper divisors (29329919).

139609729 is a wasteful number, since it uses less digits than its factorization.

139609729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1173215.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 139609729 is about 11815.6560968911. The cubic root of 139609729 is about 518.7664659408.

The spelling of 139609729 in words is "one hundred thirty-nine million, six hundred nine thousand, seven hundred twenty-nine".