16671899 has 2 divisors, whose sum is σ = 16671900. Its totient is φ = 16671898.

The previous prime is 16671841. The next prime is 16671901. The reversal of 16671899 is 99817661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16671899 - 2⁸ = 16671643 is a prime.

It is a Sophie Germain prime.

Together with 16671901, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16671199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8335949 + 8335950.

It is an arithmetic number, because the mean of its divisors is an integer number (8335950).

Almost surely, 2^16671899 is an apocalyptic number.

16671899 is a deficient number, since it is larger than the sum of its proper divisors (1).

16671899 is an equidigital number, since it uses as much as digits as its factorization.

16671899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The square root of 16671899 is about 4083.1236816927. The cubic root of 16671899 is about 255.4632052437.

The spelling of 16671899 in words is "sixteen million, six hundred seventy-one thousand, eight hundred ninety-nine".