201909970043 has 2 divisors, whose sum is σ = 201909970044. Its totient is φ = 201909970042.

The previous prime is 201909970021. The next prime is 201909970111. The reversal of 201909970043 is 340079909102.

201909970043 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201909970043 - 2⁸ = 201909969787 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 201909969976 and 201909970003.

It is not a weakly prime, because it can be changed into another prime (201909970543) 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, 100954985021 + 100954985022.

It is an arithmetic number, because the mean of its divisors is an integer number (100954985022).

Almost surely, 2^201909970043 is an apocalyptic number.

201909970043 is a deficient number, since it is larger than the sum of its proper divisors (1).

201909970043 is an equidigital number, since it uses as much as digits as its factorization.

201909970043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 44.

The spelling of 201909970043 in words is "two hundred one billion, nine hundred nine million, nine hundred seventy thousand, forty-three".