999797699 has 2 divisors, whose sum is σ = 999797700. Its totient is φ = 999797698.

The previous prime is 999797681. The next prime is 999797731. The reversal of 999797699 is 996797999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999797699 - 2⁸ = 999797443 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (999797639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499898849 + 499898850.

It is an arithmetic number, because the mean of its divisors is an integer number (499898850).

Almost surely, 2^999797699 is an apocalyptic number.

999797699 is a deficient number, since it is larger than the sum of its proper divisors (1).

999797699 is an equidigital number, since it uses as much as digits as its factorization.

999797699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 156243654, while the sum is 74.

The square root of 999797699 is about 31619.5777802298. The cubic root of 999797699 is about 999.9325617855.

The spelling of 999797699 in words is "nine hundred ninety-nine million, seven hundred ninety-seven thousand, six hundred ninety-nine".