1968625987 has 2 divisors, whose sum is σ = 1968625988. Its totient is φ = 1968625986.

The previous prime is 1968625969. The next prime is 1968626041. The reversal of 1968625987 is 7895268691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1968625987 - 2¹⁵ = 1968593219 is a prime.

It is not a weakly prime, because it can be changed into another prime (1968625907) 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, 984312993 + 984312994.

It is an arithmetic number, because the mean of its divisors is an integer number (984312994).

Almost surely, 2^1968625987 is an apocalyptic number.

1968625987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968625987 is an equidigital number, since it uses as much as digits as its factorization.

1968625987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13063680, while the sum is 61.

The square root of 1968625987 is about 44369.2008830450. The cubic root of 1968625987 is about 1253.2981672471.

The spelling of 1968625987 in words is "one billion, nine hundred sixty-eight million, six hundred twenty-five thousand, nine hundred eighty-seven".