42147923173 has 4 divisors (see below), whose sum is σ = 42148391040. Its totient is φ = 42147455308.

The previous prime is 42147923143. The next prime is 42147923189. The reversal of 42147923173 is 37132974124.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 42147923173 - 2⁵ = 42147923141 is a prime.

It is a super-2 number, since 2×42147923173² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42147923143) 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, 51253 + ... + 294826.

It is an arithmetic number, because the mean of its divisors is an integer number (10537097760).

Almost surely, 2^42147923173 is an apocalyptic number.

It is an amenable number.

42147923173 is a deficient number, since it is larger than the sum of its proper divisors (467867).

42147923173 is a wasteful number, since it uses less digits than its factorization.

42147923173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467866.

The product of its digits is 254016, while the sum is 43.

The spelling of 42147923173 in words is "forty-two billion, one hundred forty-seven million, nine hundred twenty-three thousand, one hundred seventy-three".