99638567 has 4 divisors (see below), whose sum is σ = 113872656. Its totient is φ = 85404480.

The previous prime is 99638533. The next prime is 99638629. The reversal of 99638567 is 76583699.

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

It is not a de Polignac number, because 99638567 - 2⁸ = 99638311 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 (99638467) 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, 7117034 + ... + 7117047.

It is an arithmetic number, because the mean of its divisors is an integer number (28468164).

Almost surely, 2^99638567 is an apocalyptic number.

99638567 is a deficient number, since it is larger than the sum of its proper divisors (14234089).

99638567 is a wasteful number, since it uses less digits than its factorization.

99638567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14234088.

The product of its digits is 2449440, while the sum is 53.

The square root of 99638567 is about 9981.9119911969. The cubic root of 99638567 is about 463.5990004924.

The spelling of 99638567 in words is "ninety-nine million, six hundred thirty-eight thousand, five hundred sixty-seven".