139417109 has 4 divisors (see below), whose sum is σ = 150141516. Its totient is φ = 128692704.

The previous prime is 139417093. The next prime is 139417129. The reversal of 139417109 is 901714931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47679025 + 91738084 = 6905^2 + 9578^2 .

It is a cyclic number.

It is not a de Polignac number, because 139417109 - 2⁴ = 139417093 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 (139417129) 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, 5362184 + ... + 5362209.

It is an arithmetic number, because the mean of its divisors is an integer number (37535379).

Almost surely, 2^139417109 is an apocalyptic number.

It is an amenable number.

139417109 is a deficient number, since it is larger than the sum of its proper divisors (10724407).

139417109 is a wasteful number, since it uses less digits than its factorization.

139417109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10724406.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 139417109 is about 11807.5022337495. The cubic root of 139417109 is about 518.5277748692.

The spelling of 139417109 in words is "one hundred thirty-nine million, four hundred seventeen thousand, one hundred nine".