139043317 has 4 divisors (see below), whose sum is σ = 158906656. Its totient is φ = 119179980.

The previous prime is 139043309. The next prime is 139043363. The reversal of 139043317 is 713340931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 713340931 = 193 ⋅3696067.

It is a cyclic number.

It is not a de Polignac number, because 139043317 - 2³ = 139043309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139043917) 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 3 ways as a sum of consecutive naturals, for example, 9931659 + ... + 9931672.

It is an arithmetic number, because the mean of its divisors is an integer number (39726664).

Almost surely, 2^139043317 is an apocalyptic number.

It is an amenable number.

139043317 is a deficient number, since it is larger than the sum of its proper divisors (19863339).

139043317 is an equidigital number, since it uses as much as digits as its factorization.

139043317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19863338.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 139043317 is about 11791.6630294458. The cubic root of 139043317 is about 518.0639508509.

The spelling of 139043317 in words is "one hundred thirty-nine million, forty-three thousand, three hundred seventeen".