1968274129 has 4 divisors (see below), whose sum is σ = 2000540980. Its totient is φ = 1936007280.

The previous prime is 1968274081. The next prime is 1968274169. The reversal of 1968274129 is 9214728691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19228225 + 1949045904 = 4385^2 + 44148^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968274129 - 2⁷ = 1968274001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1968274169) 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 in 3 ways as a sum of consecutive naturals, for example, 16133334 + ... + 16133455.

It is an arithmetic number, because the mean of its divisors is an integer number (500135245).

Almost surely, 2^1968274129 is an apocalyptic number.

It is an amenable number.

1968274129 is a deficient number, since it is larger than the sum of its proper divisors (32266851).

1968274129 is an equidigital number, since it uses as much as digits as its factorization.

1968274129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32266850.

The product of its digits is 435456, while the sum is 49.

The square root of 1968274129 is about 44365.2355904936. The cubic root of 1968274129 is about 1253.2234943086.

The spelling of 1968274129 in words is "one billion, nine hundred sixty-eight million, two hundred seventy-four thousand, one hundred twenty-nine".