9989741423 has 2 divisors, whose sum is σ = 9989741424. Its totient is φ = 9989741422.

The previous prime is 9989741357. The next prime is 9989741479. The reversal of 9989741423 is 3241479899.

It is an a-pointer prime, because the next prime (9989741479) can be obtained adding 9989741423 to its sum of digits (56).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9989741423 - 2¹⁶ = 9989675887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9989741483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4994870711 + 4994870712.

It is an arithmetic number, because the mean of its divisors is an integer number (4994870712).

Almost surely, 2^9989741423 is an apocalyptic number.

9989741423 is a deficient number, since it is larger than the sum of its proper divisors (1).

9989741423 is an equidigital number, since it uses as much as digits as its factorization.

9989741423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 56.

The square root of 9989741423 is about 99948.6939534479. The cubic root of 9989741423 is about 2153.6977234948.

The spelling of 9989741423 in words is "nine billion, nine hundred eighty-nine million, seven hundred forty-one thousand, four hundred twenty-three".