139119309 has 32 divisors (see below), whose sum is σ = 236125440. Its totient is φ = 79301376.

The previous prime is 139119307. The next prime is 139119353. The reversal of 139119309 is 903911931.

It is not a de Polignac number, because 139119309 - 2¹ = 139119307 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139119301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116017 + ... + 117209.

It is an arithmetic number, because the mean of its divisors is an integer number (7378920).

Almost surely, 2^139119309 is an apocalyptic number.

It is an amenable number.

139119309 is a deficient number, since it is larger than the sum of its proper divisors (97006131).

139119309 is a wasteful number, since it uses less digits than its factorization.

139119309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826 (or 1820 counting only the distinct ones).

The product of its (nonzero) digits is 6561, while the sum is 36.

The square root of 139119309 is about 11794.8848659069. The cubic root of 139119309 is about 518.1583136405.

It can be divided in two parts, 13911 and 9309, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 139119309 in words is "one hundred thirty-nine million, one hundred nineteen thousand, three hundred nine".