42170237723 has 4 divisors (see below), whose sum is σ = 44650839960. Its totient is φ = 39689635488.

The previous prime is 42170237717. The next prime is 42170237771. The reversal of 42170237723 is 32773207124.

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

It is a cyclic number.

It is not a de Polignac number, because 42170237723 - 2⁸ = 42170237467 is a prime.

It is a super-2 number, since 2×42170237723² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42170237773) 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 3 ways as a sum of consecutive naturals, for example, 1240301093 + ... + 1240301126.

It is an arithmetic number, because the mean of its divisors is an integer number (11162709990).

Almost surely, 2^42170237723 is an apocalyptic number.

42170237723 is a deficient number, since it is larger than the sum of its proper divisors (2480602237).

42170237723 is a wasteful number, since it uses less digits than its factorization.

42170237723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2480602236.

The product of its (nonzero) digits is 98784, while the sum is 38.

The spelling of 42170237723 in words is "forty-two billion, one hundred seventy million, two hundred thirty-seven thousand, seven hundred twenty-three".