99405399 has 4 divisors (see below), whose sum is σ = 132540536. Its totient is φ = 66270264.

The previous prime is 99405389. The next prime is 99405407. The reversal of 99405399 is 99350499.

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

It is not a de Polignac number, because 99405399 - 2⁵ = 99405367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99405349) 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, 16567564 + ... + 16567569.

It is an arithmetic number, because the mean of its divisors is an integer number (33135134).

Almost surely, 2^99405399 is an apocalyptic number.

99405399 is a deficient number, since it is larger than the sum of its proper divisors (33135137).

99405399 is a wasteful number, since it uses less digits than its factorization.

99405399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33135136.

The product of its (nonzero) digits is 393660, while the sum is 48.

The square root of 99405399 is about 9970.2256243277. The cubic root of 99405399 is about 463.2370894874.

The spelling of 99405399 in words is "ninety-nine million, four hundred five thousand, three hundred ninety-nine".