99409443 has 32 divisors (see below), whose sum is σ = 156275712. Its totient is φ = 55036800.

The previous prime is 99409423. The next prime is 99409447. The reversal of 99409443 is 34490499.

It is not a de Polignac number, because 99409443 - 2²¹ = 97312291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99409395 and 99409404.

It is not an unprimeable number, because it can be changed into a prime (99409447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90405 + ... + 91497.

It is an arithmetic number, because the mean of its divisors is an integer number (4883616).

Almost surely, 2^99409443 is an apocalyptic number.

99409443 is a deficient number, since it is larger than the sum of its proper divisors (56866269).

99409443 is a wasteful number, since it uses less digits than its factorization.

99409443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 99409443 is about 9970.4284261009. The cubic root of 99409443 is about 463.2433711898.

The spelling of 99409443 in words is "ninety-nine million, four hundred nine thousand, four hundred forty-three".