209892234324961 has 2 divisors, whose sum is σ = 209892234324962. Its totient is φ = 209892234324960.

The previous prime is 209892234324917. The next prime is 209892234324967. The reversal of 209892234324961 is 169423432298902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201420385830225 + 8471848494736 = 14192265^2 + 2910644^2 .

It is a cyclic number.

It is not a de Polignac number, because 209892234324961 - 2⁹ = 209892234324449 is a prime.

It is a super-2 number, since 2×209892234324961² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 209892234324893 and 209892234324902.

It is not a weakly prime, because it can be changed into another prime (209892234324967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104946117162480 + 104946117162481.

It is an arithmetic number, because the mean of its divisors is an integer number (104946117162481).

Almost surely, 2^{209892234324961} is an apocalyptic number.

It is an amenable number.

209892234324961 is a deficient number, since it is larger than the sum of its proper divisors (1).

209892234324961 is an equidigital number, since it uses as much as digits as its factorization.

209892234324961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80621568, while the sum is 64.

The spelling of 209892234324961 in words is "two hundred nine trillion, eight hundred ninety-two billion, two hundred thirty-four million, three hundred twenty-four thousand, nine hundred sixty-one".