99393409 has 4 divisors (see below), whose sum is σ = 102599680. Its totient is φ = 96187140.

The previous prime is 99393401. The next prime is 99393421. The reversal of 99393409 is 90439399.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90439399 = 41 ⋅2205839.

It is a cyclic number.

It is not a de Polignac number, because 99393409 - 2³ = 99393401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99393401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1603089 + ... + 1603150.

It is an arithmetic number, because the mean of its divisors is an integer number (25649920).

Almost surely, 2^99393409 is an apocalyptic number.

It is an amenable number.

99393409 is a deficient number, since it is larger than the sum of its proper divisors (3206271).

99393409 is a wasteful number, since it uses less digits than its factorization.

99393409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206270.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 99393409 is about 9969.6243158907. The cubic root of 99393409 is about 463.2184639531.

The spelling of 99393409 in words is "ninety-nine million, three hundred ninety-three thousand, four hundred nine".