217013983 has 2 divisors, whose sum is σ = 217013984. Its totient is φ = 217013982.

The previous prime is 217013969. The next prime is 217014013. The reversal of 217013983 is 389310712.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217013983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217013903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108506991 + 108506992.

It is an arithmetic number, because the mean of its divisors is an integer number (108506992).

Almost surely, 2^217013983 is an apocalyptic number.

217013983 is a deficient number, since it is larger than the sum of its proper divisors (1).

217013983 is an equidigital number, since it uses as much as digits as its factorization.

217013983 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 217013983 is about 14731.3944689564. The cubic root of 217013983 is about 600.9374078297.

The spelling of 217013983 in words is "two hundred seventeen million, thirteen thousand, nine hundred eighty-three".