9905143 has 4 divisors (see below), whose sum is σ = 9911440. Its totient is φ = 9898848.

The previous prime is 9905141. The next prime is 9905167. The reversal of 9905143 is 3415099.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 9905143 - 2¹ = 9905141 is a prime.

It is a super-2 number, since 2×9905143² = 196223715700898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9905141) 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, 1471 + ... + 4687.

It is an arithmetic number, because the mean of its divisors is an integer number (2477860).

Almost surely, 2^9905143 is an apocalyptic number.

9905143 is a deficient number, since it is larger than the sum of its proper divisors (6297).

9905143 is a wasteful number, since it uses less digits than its factorization.

9905143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6296.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 9905143 is about 3147.2437147447. The cubic root of 9905143 is about 214.7600929553.

The spelling of 9905143 in words is "nine million, nine hundred five thousand, one hundred forty-three".