99707819 has 2 divisors, whose sum is σ = 99707820. Its totient is φ = 99707818.

The previous prime is 99707813. The next prime is 99707837. The reversal of 99707819 is 91870799.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99707819 is a prime.

It is a super-2 number, since 2×99707819² = 19883298339473522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (99707813) 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, 49853909 + 49853910.

It is an arithmetic number, because the mean of its divisors is an integer number (49853910).

Almost surely, 2^99707819 is an apocalyptic number.

99707819 is a deficient number, since it is larger than the sum of its proper divisors (1).

99707819 is an equidigital number, since it uses as much as digits as its factorization.

99707819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 285768, while the sum is 50.

The square root of 99707819 is about 9985.3802631647. The cubic root of 99707819 is about 463.7063810104.

The spelling of 99707819 in words is "ninety-nine million, seven hundred seven thousand, eight hundred nineteen".