16199971 has 2 divisors, whose sum is σ = 16199972. Its totient is φ = 16199970.

The previous prime is 16199921. The next prime is 16200013. The reversal of 16199971 is 17999161.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (17999161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16199971 - 2⁹ = 16199459 is a prime.

It is not a weakly prime, because it can be changed into another prime (16199921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8099985 + 8099986.

It is an arithmetic number, because the mean of its divisors is an integer number (8099986).

Almost surely, 2^16199971 is an apocalyptic number.

16199971 is a deficient number, since it is larger than the sum of its proper divisors (1).

16199971 is an equidigital number, since it uses as much as digits as its factorization.

16199971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618, while the sum is 43.

The square root of 16199971 is about 4024.9187569440. The cubic root of 16199971 is about 253.0296486056.

The spelling of 16199971 in words is "sixteen million, one hundred ninety-nine thousand, nine hundred seventy-one".