43204342091 has 2 divisors, whose sum is σ = 43204342092. Its totient is φ = 43204342090.

The previous prime is 43204342007. The next prime is 43204342123. The reversal of 43204342091 is 19024340234.

It is an a-pointer prime, because the next prime (43204342123) can be obtained adding 43204342091 to its sum of digits (32).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43204342091 - 2¹⁰ = 43204341067 is a prime.

It is not a weakly prime, because it can be changed into another prime (43204342001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21602171045 + 21602171046.

It is an arithmetic number, because the mean of its divisors is an integer number (21602171046).

Almost surely, 2^43204342091 is an apocalyptic number.

43204342091 is a deficient number, since it is larger than the sum of its proper divisors (1).

43204342091 is an equidigital number, since it uses as much as digits as its factorization.

43204342091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 43204342091 in words is "forty-three billion, two hundred four million, three hundred forty-two thousand, ninety-one".