1968503939 has 2 divisors, whose sum is σ = 1968503940. Its totient is φ = 1968503938.

The previous prime is 1968503891. The next prime is 1968503989. The reversal of 1968503939 is 9393058691.

It is a weak prime.

It is an emirp because it is prime and its reverse (9393058691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1968503939 - 2¹² = 1968499843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1968503989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984251969 + 984251970.

It is an arithmetic number, because the mean of its divisors is an integer number (984251970).

Almost surely, 2^1968503939 is an apocalyptic number.

1968503939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968503939 is an equidigital number, since it uses as much as digits as its factorization.

1968503939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The square root of 1968503939 is about 44367.8254932558. The cubic root of 1968503939 is about 1253.2722666618.

The spelling of 1968503939 in words is "one billion, nine hundred sixty-eight million, five hundred three thousand, nine hundred thirty-nine".