99120019 has 2 divisors, whose sum is σ = 99120020. Its totient is φ = 99120018.

The previous prime is 99119987. The next prime is 99120061. The reversal of 99120019 is 91002199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99120019 - 2⁵ = 99119987 is a prime.

It is a super-2 number, since 2×99120019² = 19649556333120722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99126019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49560009 + 49560010.

It is an arithmetic number, because the mean of its divisors is an integer number (49560010).

Almost surely, 2^99120019 is an apocalyptic number.

99120019 is a deficient number, since it is larger than the sum of its proper divisors (1).

99120019 is an equidigital number, since it uses as much as digits as its factorization.

99120019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 31.

The square root of 99120019 is about 9955.9037259307. The cubic root of 99120019 is about 462.7933667372.

The spelling of 99120019 in words is "ninety-nine million, one hundred twenty thousand, nineteen".