16191139 has 2 divisors, whose sum is σ = 16191140. Its totient is φ = 16191138.

The previous prime is 16191127. The next prime is 16191167. The reversal of 16191139 is 93119161.

It is a weak prime.

It is an emirp because it is prime and its reverse (93119161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16191139 - 2⁵ = 16191107 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16191139.

It is not a weakly prime, because it can be changed into another prime (16191179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8095569 + 8095570.

It is an arithmetic number, because the mean of its divisors is an integer number (8095570).

Almost surely, 2^16191139 is an apocalyptic number.

16191139 is a deficient number, since it is larger than the sum of its proper divisors (1).

16191139 is an equidigital number, since it uses as much as digits as its factorization.

16191139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 31.

The square root of 16191139 is about 4023.8214423605. The cubic root of 16191139 is about 252.9836574924.

The spelling of 16191139 in words is "sixteen million, one hundred ninety-one thousand, one hundred thirty-nine".