99919019 has 2 divisors, whose sum is σ = 99919020. Its totient is φ = 99919018.

The previous prime is 99918989. The next prime is 99919063. The reversal of 99919019 is 91091999.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99919019 is a prime.

It is a super-2 number, since 2×99919019² = 19967620715844722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99919619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49959509 + 49959510.

It is an arithmetic number, because the mean of its divisors is an integer number (49959510).

Almost surely, 2^99919019 is an apocalyptic number.

99919019 is a deficient number, since it is larger than the sum of its proper divisors (1).

99919019 is an equidigital number, since it uses as much as digits as its factorization.

99919019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59049, while the sum is 47.

The square root of 99919019 is about 9995.9501299276. The cubic root of 99919019 is about 464.0335560230.

It can be divided in two parts, 999 and 19019, that multiplied together give a palindrome (18999981).

The spelling of 99919019 in words is "ninety-nine million, nine hundred nineteen thousand, nineteen".