1299423454843 has 2 divisors, whose sum is σ = 1299423454844. Its totient is φ = 1299423454842.

The previous prime is 1299423454837. The next prime is 1299423454939. The reversal of 1299423454843 is 3484543249921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1299423454843 - 2⁵ = 1299423454811 is a prime.

It is a super-2 number, since 2×1299423454843² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1299423554843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649711727421 + 649711727422.

It is an arithmetic number, because the mean of its divisors is an integer number (649711727422).

Almost surely, 2^{1299423454843} is an apocalyptic number.

1299423454843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299423454843 is an equidigital number, since it uses as much as digits as its factorization.

1299423454843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29859840, while the sum is 58.

The spelling of 1299423454843 in words is "one trillion, two hundred ninety-nine billion, four hundred twenty-three million, four hundred fifty-four thousand, eight hundred forty-three".