1968398433 has 6 divisors (see below), whose sum is σ = 2843242194. Its totient is φ = 1312265616.

The previous prime is 1968398407. The next prime is 1968398449. The reversal of 1968398433 is 3348938691.

It can be written as a sum of positive squares in only one way, i.e., 1037355264 + 931043169 = 32208^2 + 30513^2 .

It is not a de Polignac number, because 1968398433 - 2⁸ = 1968398177 is a 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 1968398433.

It is not an unprimeable number, because it can be changed into a prime (1968398833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109355460 + ... + 109355477.

It is an arithmetic number, because the mean of its divisors is an integer number (473873699).

Almost surely, 2^1968398433 is an apocalyptic number.

It is an amenable number.

1968398433 is a deficient number, since it is larger than the sum of its proper divisors (874843761).

1968398433 is a wasteful number, since it uses less digits than its factorization.

1968398433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218710943 (or 218710940 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 1968398433 is about 44366.6364850887. The cubic root of 1968398433 is about 1253.2498756972.

The spelling of 1968398433 in words is "one billion, nine hundred sixty-eight million, three hundred ninety-eight thousand, four hundred thirty-three".