99916919 has 4 divisors (see below), whose sum is σ = 103362360. Its totient is φ = 96471480.

The previous prime is 99916903. The next prime is 99916931. The reversal of 99916919 is 91961999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99916919 - 2⁴ = 99916903 is a prime.

It is a super-2 number, since 2×99916919² = 19966781404905122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99916979) 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 in 3 ways as a sum of consecutive naturals, for example, 1722677 + ... + 1722734.

It is an arithmetic number, because the mean of its divisors is an integer number (25840590).

Almost surely, 2^99916919 is an apocalyptic number.

99916919 is a deficient number, since it is larger than the sum of its proper divisors (3445441).

99916919 is a wasteful number, since it uses less digits than its factorization.

99916919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445440.

The product of its digits is 354294, while the sum is 53.

The square root of 99916919 is about 9995.8450868348. The cubic root of 99916919 is about 464.0303051327.

The spelling of 99916919 in words is "ninety-nine million, nine hundred sixteen thousand, nine hundred nineteen".