42073172789 has 8 divisors (see below), whose sum is σ = 44566225920. Its totient is φ = 39582137536.

The previous prime is 42073172777. The next prime is 42073172803. The reversal of 42073172789 is 98727137024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42073172789 - 2⁴ = 42073172773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42073172759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461429 + ... + 545034.

It is an arithmetic number, because the mean of its divisors is an integer number (5570778240).

Almost surely, 2^42073172789 is an apocalyptic number.

It is an amenable number.

42073172789 is a deficient number, since it is larger than the sum of its proper divisors (2493053131).

42073172789 is a wasteful number, since it uses less digits than its factorization.

42073172789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008939.

The product of its (nonzero) digits is 1185408, while the sum is 50.

The spelling of 42073172789 in words is "forty-two billion, seventy-three million, one hundred seventy-two thousand, seven hundred eighty-nine".