999967699 has 2 divisors, whose sum is σ = 999967700. Its totient is φ = 999967698.

The previous prime is 999967643. The next prime is 999967741. The reversal of 999967699 is 996769999.

It is a strong prime.

It is an emirp because it is prime and its reverse (996769999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999967699 - 2¹³ = 999959507 is a prime.

It is not a weakly prime, because it can be changed into another prime (999967609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499983849 + 499983850.

It is an arithmetic number, because the mean of its divisors is an integer number (499983850).

Almost surely, 2^999967699 is an apocalyptic number.

999967699 is a deficient number, since it is larger than the sum of its proper divisors (1).

999967699 is an equidigital number, since it uses as much as digits as its factorization.

999967699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 133923132, while the sum is 73.

The square root of 999967699 is about 31622.2658739060. The cubic root of 999967699 is about 999.9892328841.

The spelling of 999967699 in words is "nine hundred ninety-nine million, nine hundred sixty-seven thousand, six hundred ninety-nine".