42723117 has 12 divisors (see below), whose sum is σ = 61817184. Its totient is φ = 28433160.

The previous prime is 42723103. The next prime is 42723137. The reversal of 42723117 is 71132724.

It is a happy number.

42723117 is a `hidden beast` number, since 427 + 231 + 1 + 7 = 666.

It is not a de Polignac number, because 42723117 - 2¹⁰ = 42722093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42723137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1918 + ... + 9440.

It is an arithmetic number, because the mean of its divisors is an integer number (5151432).

Almost surely, 2^42723117 is an apocalyptic number.

It is an amenable number.

42723117 is a deficient number, since it is larger than the sum of its proper divisors (19094067).

42723117 is a wasteful number, since it uses less digits than its factorization.

42723117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8160 (or 8157 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 42723117 is about 6536.2922976256. The cubic root of 42723117 is about 349.5862239447.

The spelling of 42723117 in words is "forty-two million, seven hundred twenty-three thousand, one hundred seventeen".