16191247 has 2 divisors, whose sum is σ = 16191248. Its totient is φ = 16191246.

The previous prime is 16191223. The next prime is 16191271. The reversal of 16191247 is 74219161.

It is a balanced prime because it is at equal distance from previous prime (16191223) and next prime (16191271).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16191247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16191647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8095623 + 8095624.

It is an arithmetic number, because the mean of its divisors is an integer number (8095624).

Almost surely, 2^16191247 is an apocalyptic number.

16191247 is a deficient number, since it is larger than the sum of its proper divisors (1).

16191247 is an equidigital number, since it uses as much as digits as its factorization.

16191247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 31.

The square root of 16191247 is about 4023.8348624167. The cubic root of 16191247 is about 252.9842199847.

The spelling of 16191247 in words is "sixteen million, one hundred ninety-one thousand, two hundred forty-seven".