1983964729 has 2 divisors, whose sum is σ = 1983964730. Its totient is φ = 1983964728.

The previous prime is 1983964673. The next prime is 1983964757. The reversal of 1983964729 is 9274693891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1515155625 + 468809104 = 38925^2 + 21652^2 .

It is an emirp because it is prime and its reverse (9274693891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1983964729 - 2⁹ = 1983964217 is a prime.

It is a super-2 number, since 2×1983964729² = 7872232091832086882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1983961729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991982364 + 991982365.

It is an arithmetic number, because the mean of its divisors is an integer number (991982365).

Almost surely, 2^1983964729 is an apocalyptic number.

It is an amenable number.

1983964729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1983964729 is an equidigital number, since it uses as much as digits as its factorization.

1983964729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 58.

The square root of 1983964729 is about 44541.7189722175. The cubic root of 1983964729 is about 1256.5448147003.

The spelling of 1983964729 in words is "one billion, nine hundred eighty-three million, nine hundred sixty-four thousand, seven hundred twenty-nine".