99405447 has 4 divisors (see below), whose sum is σ = 132540600. Its totient is φ = 66270296.

The previous prime is 99405431. The next prime is 99405451. The reversal of 99405447 is 74450499.

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

It is a cyclic number.

It is not a de Polignac number, because 99405447 - 2⁴ = 99405431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99405399 and 99405408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99405407) 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, 16567572 + ... + 16567577.

It is an arithmetic number, because the mean of its divisors is an integer number (33135150).

Almost surely, 2^99405447 is an apocalyptic number.

99405447 is a deficient number, since it is larger than the sum of its proper divisors (33135153).

99405447 is a wasteful number, since it uses less digits than its factorization.

99405447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33135152.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 99405447 is about 9970.2280314946. The cubic root of 99405447 is about 463.2371640487.

The spelling of 99405447 in words is "ninety-nine million, four hundred five thousand, four hundred forty-seven".