999423737843 has 2 divisors, whose sum is σ = 999423737844. Its totient is φ = 999423737842.

The previous prime is 999423737797. The next prime is 999423737849. The reversal of 999423737843 is 348737324999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999423737843 - 2¹⁰ = 999423736819 is a prime.

It is not a weakly prime, because it can be changed into another prime (999423737849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499711868921 + 499711868922.

It is an arithmetic number, because the mean of its divisors is an integer number (499711868922).

Almost surely, 2^999423737843 is an apocalyptic number.

999423737843 is a deficient number, since it is larger than the sum of its proper divisors (1).

999423737843 is an equidigital number, since it uses as much as digits as its factorization.

999423737843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246903552, while the sum is 68.

The spelling of 999423737843 in words is "nine hundred ninety-nine billion, four hundred twenty-three million, seven hundred thirty-seven thousand, eight hundred forty-three".