9999043523 has 4 divisors (see below), whose sum is σ = 11427478320. Its totient is φ = 8570608728.

The previous prime is 9999043517. The next prime is 9999043541. The reversal of 9999043523 is 3253409999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9999043523 - 2⁴ = 9999043507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9999043423) 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, 714217388 + ... + 714217401.

It is an arithmetic number, because the mean of its divisors is an integer number (2856869580).

Almost surely, 2^9999043523 is an apocalyptic number.

9999043523 is a deficient number, since it is larger than the sum of its proper divisors (1428434797).

9999043523 is a wasteful number, since it uses less digits than its factorization.

9999043523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428434796.

The product of its (nonzero) digits is 2361960, while the sum is 53.

The square root of 9999043523 is about 99995.2175006385. The cubic root of 9999043523 is about 2154.3659989342.

The spelling of 9999043523 in words is "nine billion, nine hundred ninety-nine million, forty-three thousand, five hundred twenty-three".