1941723989 has 2 divisors, whose sum is σ = 1941723990. Its totient is φ = 1941723988.

The previous prime is 1941723941. The next prime is 1941723997. The reversal of 1941723989 is 9893271491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1845389764 + 96334225 = 42958^2 + 9815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1941723989 - 2²⁴ = 1924946773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1941723989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1941722989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 970861994 + 970861995.

It is an arithmetic number, because the mean of its divisors is an integer number (970861995).

Almost surely, 2^1941723989 is an apocalyptic number.

It is an amenable number.

1941723989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1941723989 is an equidigital number, since it uses as much as digits as its factorization.

1941723989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 53.

The square root of 1941723989 is about 44064.9973221377. The cubic root of 1941723989 is about 1247.5630363741.

The spelling of 1941723989 in words is "one billion, nine hundred forty-one million, seven hundred twenty-three thousand, nine hundred eighty-nine".