1968768731 has 2 divisors, whose sum is σ = 1968768732. Its totient is φ = 1968768730.

The previous prime is 1968768721. The next prime is 1968768751. The reversal of 1968768731 is 1378678691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1968768731 - 2⁶ = 1968768667 is a prime.

It is a super-2 number, since 2×1968768731² = 7752100632326700722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1968768701) 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, 984384365 + 984384366.

It is an arithmetic number, because the mean of its divisors is an integer number (984384366).

Almost surely, 2^1968768731 is an apocalyptic number.

1968768731 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968768731 is an equidigital number, since it uses as much as digits as its factorization.

1968768731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3048192, while the sum is 56.

The square root of 1968768731 is about 44370.8094472030. The cubic root of 1968768731 is about 1253.3284585046.

The spelling of 1968768731 in words is "one billion, nine hundred sixty-eight million, seven hundred sixty-eight thousand, seven hundred thirty-one".