9919042543 has 4 divisors (see below), whose sum is σ = 9955644448. Its totient is φ = 9882440640.

The previous prime is 9919042541. The next prime is 9919042559. The reversal of 9919042543 is 3452409199.

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 9919042543 - 2¹ = 9919042541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9919042493 and 9919042502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9919042541) 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, 18300546 + ... + 18301087.

It is an arithmetic number, because the mean of its divisors is an integer number (2488911112).

Almost surely, 2^9919042543 is an apocalyptic number.

9919042543 is a deficient number, since it is larger than the sum of its proper divisors (36601905).

9919042543 is a wasteful number, since it uses less digits than its factorization.

9919042543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36601904.

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 9919042543 is about 99594.3901181186. The cubic root of 9919042543 is about 2148.6050112895.

The spelling of 9919042543 in words is "nine billion, nine hundred nineteen million, forty-two thousand, five hundred forty-three".