309821034240043 has 2 divisors, whose sum is σ = 309821034240044. Its totient is φ = 309821034240042.

The previous prime is 309821034239863. The next prime is 309821034240071. The reversal of 309821034240043 is 340042430128903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 309821034240043 - 2⁹ = 309821034239531 is a prime.

It is not a weakly prime, because it can be changed into another prime (309821074240043) 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, 154910517120021 + 154910517120022.

It is an arithmetic number, because the mean of its divisors is an integer number (154910517120022).

Almost surely, 2^{309821034240043} is an apocalyptic number.

309821034240043 is a deficient number, since it is larger than the sum of its proper divisors (1).

309821034240043 is an equidigital number, since it uses as much as digits as its factorization.

309821034240043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 43.

Adding to 309821034240043 its reverse (340042430128903), we get a palindrome (649863464368946).

The spelling of 309821034240043 in words is "three hundred nine trillion, eight hundred twenty-one billion, thirty-four million, two hundred forty thousand, forty-three".