1968218983 has 2 divisors, whose sum is σ = 1968218984. Its totient is φ = 1968218982.

The previous prime is 1968218963. The next prime is 1968219007. The reversal of 1968218983 is 3898128691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1968218983 - 2¹³ = 1968210791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968218933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984109491 + 984109492.

It is an arithmetic number, because the mean of its divisors is an integer number (984109492).

Almost surely, 2^1968218983 is an apocalyptic number.

1968218983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968218983 is an equidigital number, since it uses as much as digits as its factorization.

1968218983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 55.

The square root of 1968218983 is about 44364.6140860033. The cubic root of 1968218983 is about 1253.2117901618.

The spelling of 1968218983 in words is "one billion, nine hundred sixty-eight million, two hundred eighteen thousand, nine hundred eighty-three".