99643607 has 6 divisors (see below), whose sum is σ = 115912008. Its totient is φ = 85408764.

The previous prime is 99643603. The next prime is 99643631. The reversal of 99643607 is 70634699.

It is not a de Polignac number, because 99643607 - 2² = 99643603 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 (99643603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1016723 + ... + 1016820.

It is an arithmetic number, because the mean of its divisors is an integer number (19318668).

Almost surely, 2^99643607 is an apocalyptic number.

99643607 is a deficient number, since it is larger than the sum of its proper divisors (16268401).

99643607 is a wasteful number, since it uses less digits than its factorization.

99643607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033557 (or 2033550 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 99643607 is about 9982.1644446483. The cubic root of 99643607 is about 463.6068170760.

The spelling of 99643607 in words is "ninety-nine million, six hundred forty-three thousand, six hundred seven".