42723273 has 4 divisors (see below), whose sum is σ = 56964368. Its totient is φ = 28482180.

The previous prime is 42723269. The next prime is 42723277. The reversal of 42723273 is 37232724.

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.

It is an interprime number because it is at equal distance from previous prime (42723269) and next prime (42723277).

It is not a de Polignac number, because 42723273 - 2² = 42723269 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42723273.

It is not an unprimeable number, because it can be changed into a prime (42723277) 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, 7120543 + ... + 7120548.

It is an arithmetic number, because the mean of its divisors is an integer number (14241092).

Almost surely, 2^42723273 is an apocalyptic number.

It is an amenable number.

42723273 is a deficient number, since it is larger than the sum of its proper divisors (14241095).

42723273 is a wasteful number, since it uses less digits than its factorization.

42723273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14241094.

The product of its digits is 14112, while the sum is 30.

The square root of 42723273 is about 6536.3042309856. The cubic root of 42723273 is about 349.5866494395.

Adding to 42723273 its reverse (37232724), we get a palindrome (79955997).

The spelling of 42723273 in words is "forty-two million, seven hundred twenty-three thousand, two hundred seventy-three".