1968893957 has 2 divisors, whose sum is σ = 1968893958. Its totient is φ = 1968893956.

The previous prime is 1968893951. The next prime is 1968893963. The reversal of 1968893957 is 7593988691.

It is a balanced prime because it is at equal distance from previous prime (1968893951) and next prime (1968893963).

It can be written as a sum of positive squares in only one way, i.e., 1423251076 + 545642881 = 37726^2 + 23359^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968893957 - 2⁸ = 1968893701 is a prime.

It is a super-2 number, since 2×1968893957² = 7753086827822235698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1968893893 and 1968893902.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968893951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984446978 + 984446979.

It is an arithmetic number, because the mean of its divisors is an integer number (984446979).

Almost surely, 2^1968893957 is an apocalyptic number.

It is an amenable number.

1968893957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968893957 is an equidigital number, since it uses as much as digits as its factorization.

1968893957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29393280, while the sum is 65.

The square root of 1968893957 is about 44372.2205552077. The cubic root of 1968893957 is about 1253.3550311164.

The spelling of 1968893957 in words is "one billion, nine hundred sixty-eight million, eight hundred ninety-three thousand, nine hundred fifty-seven".