17391139 has 4 divisors (see below), whose sum is σ = 17611360. Its totient is φ = 17170920.

The previous prime is 17391113. The next prime is 17391149. The reversal of 17391139 is 93119371.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93119371 = 4451 ⋅20921.

It is a cyclic number.

It is not a de Polignac number, because 17391139 - 2⁵ = 17391107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17391149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109992 + ... + 110149.

It is an arithmetic number, because the mean of its divisors is an integer number (4402840).

Almost surely, 2^17391139 is an apocalyptic number.

17391139 is a deficient number, since it is larger than the sum of its proper divisors (220221).

17391139 is an equidigital number, since it uses as much as digits as its factorization.

17391139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220220.

The product of its digits is 5103, while the sum is 34.

The square root of 17391139 is about 4170.2684565865. The cubic root of 17391139 is about 259.0852419888.

The spelling of 17391139 in words is "seventeen million, three hundred ninety-one thousand, one hundred thirty-nine".