16671139 has 4 divisors (see below), whose sum is σ = 16699480. Its totient is φ = 16642800.

The previous prime is 16671121. The next prime is 16671157. The reversal of 16671139 is 93117661.

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

It is an interprime number because it is at equal distance from previous prime (16671121) and next prime (16671157).

It is a cyclic number.

It is not a de Polignac number, because 16671139 - 2¹¹ = 16669091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16671199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13269 + ... + 14470.

It is an arithmetic number, because the mean of its divisors is an integer number (4174870).

Almost surely, 2^16671139 is an apocalyptic number.

16671139 is a deficient number, since it is larger than the sum of its proper divisors (28341).

16671139 is an equidigital number, since it uses as much as digits as its factorization.

16671139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28340.

The product of its digits is 6804, while the sum is 34.

The square root of 16671139 is about 4083.0306146293. The cubic root of 16671139 is about 255.4593233626.

The spelling of 16671139 in words is "sixteen million, six hundred seventy-one thousand, one hundred thirty-nine".