42317923 has 4 divisors (see below), whose sum is σ = 42348888. Its totient is φ = 42286960.

The previous prime is 42317911. The next prime is 42317929. The reversal of 42317923 is 32971324.

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 42317923 - 2⁹ = 42317411 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42317929) 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, 13333 + ... + 16198.

It is an arithmetic number, because the mean of its divisors is an integer number (10587222).

Almost surely, 2^42317923 is an apocalyptic number.

42317923 is a deficient number, since it is larger than the sum of its proper divisors (30965).

42317923 is a wasteful number, since it uses less digits than its factorization.

42317923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30964.

The product of its digits is 9072, while the sum is 31.

The square root of 42317923 is about 6505.2227479157. Note that the first 3 decimals coincide. The cubic root of 42317923 is about 348.4775312168.

The spelling of 42317923 in words is "forty-two million, three hundred seventeen thousand, nine hundred twenty-three".