99443919 has 8 divisors (see below), whose sum is σ = 133470592. Its totient is φ = 65856600.

The previous prime is 99443909. The next prime is 99443947. The reversal of 99443919 is 91934499.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99443919 - 2⁵ = 99443887 is a prime.

It is a super-2 number, since 2×99443919² = 19778186052157122, 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 (99443909) 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 7 ways as a sum of consecutive naturals, for example, 109309 + ... + 110214.

It is an arithmetic number, because the mean of its divisors is an integer number (16683824).

Almost surely, 2^99443919 is an apocalyptic number.

99443919 is a deficient number, since it is larger than the sum of its proper divisors (34026673).

99443919 is a wasteful number, since it uses less digits than its factorization.

99443919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219677.

The product of its digits is 314928, while the sum is 48.

The square root of 99443919 is about 9972.1571888935. The cubic root of 99443919 is about 463.2969171846.

The spelling of 99443919 in words is "ninety-nine million, four hundred forty-three thousand, nine hundred nineteen".