99563943 has 8 divisors (see below), whose sum is σ = 134733568. Its totient is φ = 65385144.

The previous prime is 99563923. The next prime is 99563953. The reversal of 99563943 is 34936599.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 99563943 - 2⁵ = 99563911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99563892 and 99563901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99563903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247471 + ... + 247872.

It is an arithmetic number, because the mean of its divisors is an integer number (16841696).

Almost surely, 2^99563943 is an apocalyptic number.

99563943 is a deficient number, since it is larger than the sum of its proper divisors (35169625).

99563943 is a wasteful number, since it uses less digits than its factorization.

99563943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495413.

The product of its digits is 787320, while the sum is 48.

The square root of 99563943 is about 9978.1733298235. The cubic root of 99563943 is about 463.4832345689.

The spelling of 99563943 in words is "ninety-nine million, five hundred sixty-three thousand, nine hundred forty-three".