42973723 has 4 divisors (see below), whose sum is σ = 46279408. Its totient is φ = 39668040.

The previous prime is 42973681. The next prime is 42973747. The reversal of 42973723 is 32737924.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42973723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42973753) 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, 1652823 + ... + 1652848.

It is an arithmetic number, because the mean of its divisors is an integer number (11569852).

Almost surely, 2^42973723 is an apocalyptic number.

42973723 is a deficient number, since it is larger than the sum of its proper divisors (3305685).

42973723 is a wasteful number, since it uses less digits than its factorization.

42973723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3305684.

The product of its digits is 63504, while the sum is 37.

The square root of 42973723 is about 6555.4346156453. The cubic root of 42973723 is about 350.2684280934.

The spelling of 42973723 in words is "forty-two million, nine hundred seventy-three thousand, seven hundred twenty-three".