1968999273 has 10 divisors (see below), whose sum is σ = 2941344714. Its totient is φ = 1312666128.

The previous prime is 1968999257. The next prime is 1968999287. The reversal of 1968999273 is 3729998691.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1918702809 + 50296464 = 43803^2 + 7092^2 .

It is not a de Polignac number, because 1968999273 - 2⁴ = 1968999257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1968999273.

It is not an unprimeable number, because it can be changed into a prime (1968999223) 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 9 ways as a sum of consecutive naturals, for example, 12154236 + ... + 12154397.

Almost surely, 2^1968999273 is an apocalyptic number.

It is an amenable number.

1968999273 is a deficient number, since it is larger than the sum of its proper divisors (972345441).

1968999273 is an equidigital number, since it uses as much as digits as its factorization.

1968999273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24308645 (or 24308636 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 63.

The square root of 1968999273 is about 44373.4072728250. The cubic root of 1968999273 is about 1253.3773780090.

The spelling of 1968999273 in words is "one billion, nine hundred sixty-eight million, nine hundred ninety-nine thousand, two hundred seventy-three".