139753209 has 32 divisors (see below), whose sum is σ = 202953600. Its totient is φ = 85210112.

The previous prime is 139753199. The next prime is 139753217. The reversal of 139753209 is 902357931.

It is a cyclic number.

It is not a de Polignac number, because 139753209 - 2⁸ = 139752953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139753219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402574 + ... + 402920.

It is an arithmetic number, because the mean of its divisors is an integer number (6342300).

Almost surely, 2^139753209 is an apocalyptic number.

It is an amenable number.

139753209 is a deficient number, since it is larger than the sum of its proper divisors (63200391).

139753209 is a wasteful number, since it uses less digits than its factorization.

139753209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569.

The product of its (nonzero) digits is 51030, while the sum is 39.

The square root of 139753209 is about 11821.7261429962. The cubic root of 139753209 is about 518.9441210105.

The spelling of 139753209 in words is "one hundred thirty-nine million, seven hundred fifty-three thousand, two hundred nine".