16091899 has 2 divisors, whose sum is σ = 16091900. Its totient is φ = 16091898.

The previous prime is 16091869. The next prime is 16091923. The reversal of 16091899 is 99819061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16091899 - 2⁷ = 16091771 is a prime.

It is not a weakly prime, because it can be changed into another prime (16091869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8045949 + 8045950.

It is an arithmetic number, because the mean of its divisors is an integer number (8045950).

Almost surely, 2^16091899 is an apocalyptic number.

16091899 is a deficient number, since it is larger than the sum of its proper divisors (1).

16091899 is an equidigital number, since it uses as much as digits as its factorization.

16091899 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 43.

The square root of 16091899 is about 4011.4709272286. The cubic root of 16091899 is about 252.4657287735.

The spelling of 16091899 in words is "sixteen million, ninety-one thousand, eight hundred ninety-nine".