43197967642 has 4 divisors (see below), whose sum is σ = 64796951466. Its totient is φ = 21598983820.

The previous prime is 43197967633. The next prime is 43197967663. The reversal of 43197967642 is 24676979134.

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

It can be written as a sum of positive squares in only one way, i.e., 42716209041 + 481758601 = 206679^2 + 21949^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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, 10799491909 + ... + 10799491912.

Almost surely, 2^43197967642 is an apocalyptic number.

43197967642 is a deficient number, since it is larger than the sum of its proper divisors (21598983824).

43197967642 is a wasteful number, since it uses less digits than its factorization.

43197967642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21598983823.

The product of its digits is 13716864, while the sum is 58.

The spelling of 43197967642 in words is "forty-three billion, one hundred ninety-seven million, nine hundred sixty-seven thousand, six hundred forty-two".