1968000061 has 2 divisors, whose sum is σ = 1968000062. Its totient is φ = 1968000060.

The previous prime is 1968000043. The next prime is 1968000071. The reversal of 1968000061 is 1600008691.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1420159225 + 547840836 = 37685^2 + 23406^2 .

It is an emirp because it is prime and its reverse (1600008691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1968000061 - 2¹⁵ = 1967967293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1967999987 and 1968000032.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968000011) 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, 984000030 + 984000031.

It is an arithmetic number, because the mean of its divisors is an integer number (984000031).

Almost surely, 2^1968000061 is an apocalyptic number.

It is an amenable number.

1968000061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968000061 is an equidigital number, since it uses as much as digits as its factorization.

1968000061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1968000061 is about 44362.1467131608. The cubic root of 1968000061 is about 1253.1653241593.

The spelling of 1968000061 in words is "one billion, nine hundred sixty-eight million, sixty-one", and thus it is an aban number.