1671116999 has 2 divisors, whose sum is σ = 1671117000. Its totient is φ = 1671116998.

The previous prime is 1671116987. The next prime is 1671117029. The reversal of 1671116999 is 9996111761.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1671116999 - 2⁸ = 1671116743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671116929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835558499 + 835558500.

It is an arithmetic number, because the mean of its divisors is an integer number (835558500).

Almost surely, 2^1671116999 is an apocalyptic number.

1671116999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671116999 is an equidigital number, since it uses as much as digits as its factorization.

1671116999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 50.

The square root of 1671116999 is about 40879.2979269459. The cubic root of 1671116999 is about 1186.6854540942.

The spelling of 1671116999 in words is "one billion, six hundred seventy-one million, one hundred sixteen thousand, nine hundred ninety-nine".