999423729611 has 2 divisors, whose sum is σ = 999423729612. Its totient is φ = 999423729610.

The previous prime is 999423729599. The next prime is 999423729671. The reversal of 999423729611 is 116927324999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999423729611 - 2¹⁸ = 999423467467 is a prime.

It is a super-2 number, since 2×999423729611² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (999423729671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499711864805 + 499711864806.

It is an arithmetic number, because the mean of its divisors is an integer number (499711864806).

Almost surely, 2^999423729611 is an apocalyptic number.

999423729611 is a deficient number, since it is larger than the sum of its proper divisors (1).

999423729611 is an equidigital number, since it uses as much as digits as its factorization.

999423729611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 62.

The spelling of 999423729611 in words is "nine hundred ninety-nine billion, four hundred twenty-three million, seven hundred twenty-nine thousand, six hundred eleven".