209430041641 has 2 divisors, whose sum is σ = 209430041642. Its totient is φ = 209430041640.

The previous prime is 209430041599. The next prime is 209430041659. The reversal of 209430041641 is 146140034902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112815374400 + 96614667241 = 335880^2 + 310829^2 .

It is a cyclic number.

It is not a de Polignac number, because 209430041641 - 2¹⁵ = 209430008873 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209430041597 and 209430041606.

It is not a weakly prime, because it can be changed into another prime (209430041441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104715020820 + 104715020821.

It is an arithmetic number, because the mean of its divisors is an integer number (104715020821).

Almost surely, 2^209430041641 is an apocalyptic number.

It is an amenable number.

209430041641 is a deficient number, since it is larger than the sum of its proper divisors (1).

209430041641 is an equidigital number, since it uses as much as digits as its factorization.

209430041641 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 34.

The spelling of 209430041641 in words is "two hundred nine billion, four hundred thirty million, forty-one thousand, six hundred forty-one".