1967742739873 has 4 divisors (see below), whose sum is σ = 1967745560980. Its totient is φ = 1967739918768.

The previous prime is 1967742739847. The next prime is 1967742739889. The reversal of 1967742739873 is 3789372477691.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 239127846049 + 1728614893824 = 489007^2 + 1314768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1967742739873 is a prime.

It is a super-2 number, since 2×1967742739873² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1967742739796 and 1967742739805.

It is not an unprimeable number, because it can be changed into a prime (1967742739073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483211 + ... + 2041807.

It is an arithmetic number, because the mean of its divisors is an integer number (491936390245).

Almost surely, 2^{1967742739873} is an apocalyptic number.

It is an amenable number.

1967742739873 is a deficient number, since it is larger than the sum of its proper divisors (2821107).

1967742739873 is a wasteful number, since it uses less digits than its factorization.

1967742739873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821106.

The product of its digits is 672126336, while the sum is 73.

The spelling of 1967742739873 in words is "one trillion, nine hundred sixty-seven billion, seven hundred forty-two million, seven hundred thirty-nine thousand, eight hundred seventy-three".