1968991103 has 2 divisors, whose sum is σ = 1968991104. Its totient is φ = 1968991102.

The previous prime is 1968991097. The next prime is 1968991117. The reversal of 1968991103 is 3011998691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1968991103 - 2²⁶ = 1901882239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968991183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984495551 + 984495552.

It is an arithmetic number, because the mean of its divisors is an integer number (984495552).

Almost surely, 2^1968991103 is an apocalyptic number.

1968991103 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968991103 is an equidigital number, since it uses as much as digits as its factorization.

1968991103 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 47.

The square root of 1968991103 is about 44373.3152130872. The cubic root of 1968991103 is about 1253.3756444537.

The spelling of 1968991103 in words is "one billion, nine hundred sixty-eight million, nine hundred ninety-one thousand, one hundred three".