42723133 has 4 divisors (see below), whose sum is σ = 42739360. Its totient is φ = 42706908.

The previous prime is 42723103. The next prime is 42723137. The reversal of 42723133 is 33132724.

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 a cyclic number.

It is not a de Polignac number, because 42723133 - 2²⁵ = 9168701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42723098 and 42723107.

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 3 ways as a sum of consecutive naturals, for example, 3153 + ... + 9766.

It is an arithmetic number, because the mean of its divisors is an integer number (10684840).

Almost surely, 2^42723133 is an apocalyptic number.

It is an amenable number.

42723133 is a deficient number, since it is larger than the sum of its proper divisors (16227).

42723133 is a wasteful number, since it uses less digits than its factorization.

42723133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16226.

The product of its digits is 3024, while the sum is 25.

The square root of 42723133 is about 6536.2935215610. The cubic root of 42723133 is about 349.5862675853.

Adding to 42723133 its reverse (33132724), we get a palindrome (75855857).

The spelling of 42723133 in words is "forty-two million, seven hundred twenty-three thousand, one hundred thirty-three".