99999943 has 8 divisors (see below), whose sum is σ = 102831120. Its totient is φ = 97187520.

The previous prime is 99999941. The next prime is 99999959. The reversal of 99999943 is 34999999.

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

It is a cyclic number.

It is not a de Polignac number, because 99999943 - 2¹ = 99999941 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999941) 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, 6496 + ... + 15562.

It is an arithmetic number, because the mean of its divisors is an integer number (12853890).

Almost surely, 2^99999943 is an apocalyptic number.

99999943 is a deficient number, since it is larger than the sum of its proper divisors (2831177).

99999943 is a wasteful number, since it uses less digits than its factorization.

99999943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9377.

The product of its digits is 6377292, while the sum is 61.

The square root of 99999943 is about 9999.9971499996. The cubic root of 99999943 is about 464.1587951711.

The spelling of 99999943 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-three".