209075983 has 2 divisors, whose sum is σ = 209075984. Its totient is φ = 209075982.

The previous prime is 209075963. The next prime is 209075987. The reversal of 209075983 is 389570902.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209075983 - 2²¹ = 206978831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209075987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104537991 + 104537992.

It is an arithmetic number, because the mean of its divisors is an integer number (104537992).

Almost surely, 2^209075983 is an apocalyptic number.

209075983 is a deficient number, since it is larger than the sum of its proper divisors (1).

209075983 is an equidigital number, since it uses as much as digits as its factorization.

209075983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 209075983 is about 14459.4599830007. The cubic root of 209075983 is about 593.5191222319.

The spelling of 209075983 in words is "two hundred nine million, seventy-five thousand, nine hundred eighty-three".