208932983500909 has 2 divisors, whose sum is σ = 208932983500910. Its totient is φ = 208932983500908.

The previous prime is 208932983500897. The next prime is 208932983500963. The reversal of 208932983500909 is 909005389239802.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 189778093344009 + 19154890156900 = 13775997^2 + 4376630^2 .

It is a cyclic number.

It is not a de Polignac number, because 208932983500909 - 2³⁹ = 208383227687021 is a prime.

It is a super-2 number, since 2×208932983500909² (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 (208932981500909) 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, 104466491750454 + 104466491750455.

It is an arithmetic number, because the mean of its divisors is an integer number (104466491750455).

Almost surely, 2^{208932983500909} is an apocalyptic number.

It is an amenable number.

208932983500909 is a deficient number, since it is larger than the sum of its proper divisors (1).

208932983500909 is an equidigital number, since it uses as much as digits as its factorization.

208932983500909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75582720, while the sum is 67.

The spelling of 208932983500909 in words is "two hundred eight trillion, nine hundred thirty-two billion, nine hundred eighty-three million, five hundred thousand, nine hundred nine".