16019999 has 2 divisors, whose sum is σ = 16020000. Its totient is φ = 16019998.

The previous prime is 16019987. The next prime is 16020007. The reversal of 16019999 is 99991061.

It is a happy number.

16019999 is nontrivially palindromic in base 7.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16019999 - 2²⁰ = 14971423 is a prime.

16019999 is a modest number, since divided by 9999 gives 1601 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16019909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8009999 + 8010000.

It is an arithmetic number, because the mean of its divisors is an integer number (8010000).

Almost surely, 2^16019999 is an apocalyptic number.

16019999 is a deficient number, since it is larger than the sum of its proper divisors (1).

16019999 is an equidigital number, since it uses as much as digits as its factorization.

16019999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 16019999 is about 4002.4990943159. The cubic root of 16019999 is about 252.0891544376.

The spelling of 16019999 in words is "sixteen million, nineteen thousand, nine hundred ninety-nine".