16139191 has 2 divisors, whose sum is σ = 16139192. Its totient is φ = 16139190.

The previous prime is 16139159. The next prime is 16139203. The reversal of 16139191 is 19193161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16139191 - 2⁵ = 16139159 is a prime.

It is a super-2 number, since 2×16139191² = 520946972268962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16139111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8069595 + 8069596.

It is an arithmetic number, because the mean of its divisors is an integer number (8069596).

Almost surely, 2^16139191 is an apocalyptic number.

16139191 is a deficient number, since it is larger than the sum of its proper divisors (1).

16139191 is an equidigital number, since it uses as much as digits as its factorization.

16139191 is an odious number, because the sum of its binary digits is odd.

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

The square root of 16139191 is about 4017.3611985979. The cubic root of 16139191 is about 252.7128082094.

The spelling of 16139191 in words is "sixteen million, one hundred thirty-nine thousand, one hundred ninety-one".