99647505 has 24 divisors (see below), whose sum is σ = 173115072. Its totient is φ = 53024544.

The previous prime is 99647503. The next prime is 99647521. The reversal of 99647505 is 50574699.

It is a happy number.

It is not a de Polignac number, because 99647505 - 2¹ = 99647503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (99647501) 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, 19642 + ... + 24188.

It is an arithmetic number, because the mean of its divisors is an integer number (7213128).

Almost surely, 2^99647505 is an apocalyptic number.

It is an amenable number.

99647505 is a deficient number, since it is larger than the sum of its proper divisors (73467567).

99647505 is a wasteful number, since it uses less digits than its factorization.

99647505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5045 (or 5042 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 99647505 is about 9982.3596909749. The cubic root of 99647505 is about 463.6128623403.

The spelling of 99647505 in words is "ninety-nine million, six hundred forty-seven thousand, five hundred five".