42723427 has 4 divisors (see below), whose sum is σ = 42744240. Its totient is φ = 42702616.

The previous prime is 42723413. The next prime is 42723433. The reversal of 42723427 is 72432724.

42723427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42723427 - 2⁷ = 42723299 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 (42723407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6943 + ... + 11560.

It is an arithmetic number, because the mean of its divisors is an integer number (10686060).

Almost surely, 2^42723427 is an apocalyptic number.

42723427 is a deficient number, since it is larger than the sum of its proper divisors (20813).

42723427 is a wasteful number, since it uses less digits than its factorization.

42723427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20812.

The product of its digits is 18816, while the sum is 31.

The square root of 42723427 is about 6536.3160113324. The cubic root of 42723427 is about 349.5870694781.

The spelling of 42723427 in words is "forty-two million, seven hundred twenty-three thousand, four hundred twenty-seven".