99673645 has 4 divisors (see below), whose sum is σ = 119608380. Its totient is φ = 79738912.

The previous prime is 99673643. The next prime is 99673661. The reversal of 99673645 is 54637699.

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

It can be written as a sum of positive squares in 2 ways, for example, as 68459076 + 31214569 = 8274^2 + 5587^2 .

It is a cyclic number.

It is not a de Polignac number, because 99673645 - 2¹ = 99673643 is a prime.

It is a super-3 number, since 3×99673645³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99673643) 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, 9967360 + ... + 9967369.

It is an arithmetic number, because the mean of its divisors is an integer number (29902095).

Almost surely, 2^99673645 is an apocalyptic number.

It is an amenable number.

99673645 is a deficient number, since it is larger than the sum of its proper divisors (19934735).

99673645 is a wasteful number, since it uses less digits than its factorization.

99673645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19934734.

The product of its digits is 1224720, while the sum is 49.

The square root of 99673645 is about 9983.6689147828. The cubic root of 99673645 is about 463.6533978281.

The spelling of 99673645 in words is "ninety-nine million, six hundred seventy-three thousand, six hundred forty-five".