1983357217 has 2 divisors, whose sum is σ = 1983357218. Its totient is φ = 1983357216.

The previous prime is 1983357197. The next prime is 1983357251. The reversal of 1983357217 is 7127533891.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1964616976 + 18740241 = 44324^2 + 4329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1983357217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1983357017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991678608 + 991678609.

It is an arithmetic number, because the mean of its divisors is an integer number (991678609).

Almost surely, 2^1983357217 is an apocalyptic number.

It is an amenable number.

1983357217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983357217 is an equidigital number, since it uses as much as digits as its factorization.

1983357217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 46.

The square root of 1983357217 is about 44534.8988659456. The cubic root of 1983357217 is about 1256.4165456216.

The spelling of 1983357217 in words is "one billion, nine hundred eighty-three million, three hundred fifty-seven thousand, two hundred seventeen".