139346209 has 16 divisors (see below), whose sum is σ = 152064000. Its totient is φ = 127204560.

The previous prime is 139346203. The next prime is 139346219. The reversal of 139346209 is 902643931.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139346209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139346203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211122 + ... + 211780.

It is an arithmetic number, because the mean of its divisors is an integer number (9504000).

Almost surely, 2^139346209 is an apocalyptic number.

139346209 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

139346209 is a deficient number, since it is larger than the sum of its proper divisors (12717791).

139346209 is a wasteful number, since it uses less digits than its factorization.

139346209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068.

The product of its (nonzero) digits is 34992, while the sum is 37.

The square root of 139346209 is about 11804.4995234868. The cubic root of 139346209 is about 518.4398615725.

The spelling of 139346209 in words is "one hundred thirty-nine million, three hundred forty-six thousand, two hundred nine".