99019919 has 2 divisors, whose sum is σ = 99019920. Its totient is φ = 99019918.

The previous prime is 99019909. The next prime is 99019931. The reversal of 99019919 is 91991099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99019919 - 2⁸ = 99019663 is a prime.

It is a super-2 number, since 2×99019919² = 19609888717533122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99019909) 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, 49509959 + 49509960.

It is an arithmetic number, because the mean of its divisors is an integer number (49509960).

Almost surely, 2^99019919 is an apocalyptic number.

99019919 is a deficient number, since it is larger than the sum of its proper divisors (1).

99019919 is an equidigital number, since it uses as much as digits as its factorization.

99019919 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 99019919 is about 9950.8752881342. The cubic root of 99019919 is about 462.6375246252.

The spelling of 99019919 in words is "ninety-nine million, nineteen thousand, nine hundred nineteen".