99444609 has 24 divisors (see below), whose sum is σ = 157090752. Its totient is φ = 60119520.

The previous prime is 99444607. The next prime is 99444619. The reversal of 99444609 is 90644499.

99444609 = 75² + 76² + ... + 668².

It is not a de Polignac number, because 99444609 - 2¹ = 99444607 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99444607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48799 + ... + 50795.

It is an arithmetic number, because the mean of its divisors is an integer number (6545448).

Almost surely, 2^99444609 is an apocalyptic number.

99444609 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

99444609 is a deficient number, since it is larger than the sum of its proper divisors (57646143).

99444609 is a wasteful number, since it uses less digits than its factorization.

99444609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2517 (or 2514 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 99444609 is about 9972.1917851594. The cubic root of 99444609 is about 463.2979887237.

The spelling of 99444609 in words is "ninety-nine million, four hundred forty-four thousand, six hundred nine".