99865632389 has 4 divisors (see below), whose sum is σ = 99868737024. Its totient is φ = 99862527756.

The previous prime is 99865632379. The next prime is 99865632397. The reversal of 99865632389 is 98323656899.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99865632389 - 2¹² = 99865628293 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 (99865632379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1503557 + ... + 1568570.

It is an arithmetic number, because the mean of its divisors is an integer number (24967184256).

Almost surely, 2^99865632389 is an apocalyptic number.

It is an amenable number.

99865632389 is a deficient number, since it is larger than the sum of its proper divisors (3104635).

99865632389 is a wasteful number, since it uses less digits than its factorization.

99865632389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104634.

The product of its digits is 151165440, while the sum is 68.

The spelling of 99865632389 in words is "ninety-nine billion, eight hundred sixty-five million, six hundred thirty-two thousand, three hundred eighty-nine".