99829781423 has 2 divisors, whose sum is σ = 99829781424. Its totient is φ = 99829781422.

The previous prime is 99829781413. The next prime is 99829781503. The reversal of 99829781423 is 32418792899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99829781423 - 2¹⁰ = 99829780399 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 (99829781413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49914890711 + 49914890712.

It is an arithmetic number, because the mean of its divisors is an integer number (49914890712).

Almost surely, 2^99829781423 is an apocalyptic number.

99829781423 is a deficient number, since it is larger than the sum of its proper divisors (1).

99829781423 is an equidigital number, since it uses as much as digits as its factorization.

99829781423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15676416, while the sum is 62.

The spelling of 99829781423 in words is "ninety-nine billion, eight hundred twenty-nine million, seven hundred eighty-one thousand, four hundred twenty-three".