209101839820007 has 2 divisors, whose sum is σ = 209101839820008. Its totient is φ = 209101839820006.

The previous prime is 209101839819911. The next prime is 209101839820031. The reversal of 209101839820007 is 700028938101902.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209101839820007 is a prime.

It is a super-2 number, since 2×209101839820007² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209101839820037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104550919910003 + 104550919910004.

It is an arithmetic number, because the mean of its divisors is an integer number (104550919910004).

Almost surely, 2^{209101839820007} is an apocalyptic number.

209101839820007 is a deficient number, since it is larger than the sum of its proper divisors (1).

209101839820007 is an equidigital number, since it uses as much as digits as its factorization.

209101839820007 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 209101839820007 in words is "two hundred nine trillion, one hundred one billion, eight hundred thirty-nine million, eight hundred twenty thousand, seven".