99574645 has 4 divisors (see below), whose sum is σ = 119489580. Its totient is φ = 79659712.

The previous prime is 99574639. The next prime is 99574667. The reversal of 99574645 is 54647599.

It is a happy number.

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 36990724 + 62583921 = 6082^2 + 7911^2 .

It is a cyclic number.

It is not a de Polignac number, because 99574645 - 2⁹ = 99574133 is a prime.

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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9957460 + ... + 9957469.

It is an arithmetic number, because the mean of its divisors is an integer number (29872395).

Almost surely, 2^99574645 is an apocalyptic number.

It is an amenable number.

99574645 is a deficient number, since it is larger than the sum of its proper divisors (19914935).

99574645 is a wasteful number, since it uses less digits than its factorization.

99574645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19914934.

The product of its digits is 1360800, while the sum is 49.

The square root of 99574645 is about 9978.7095859134. The cubic root of 99574645 is about 463.4998403793.

The spelling of 99574645 in words is "ninety-nine million, five hundred seventy-four thousand, six hundred forty-five".