42823423 has 4 divisors (see below), whose sum is σ = 43062840. Its totient is φ = 42584008.

The previous prime is 42823421. The next prime is 42823453. The reversal of 42823423 is 32432824.

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 42823423 - 2¹ = 42823421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42823391 and 42823400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42823421) 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, 119440 + ... + 119797.

It is an arithmetic number, because the mean of its divisors is an integer number (10765710).

Almost surely, 2^42823423 is an apocalyptic number.

42823423 is a deficient number, since it is larger than the sum of its proper divisors (239417).

42823423 is a wasteful number, since it uses less digits than its factorization.

42823423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239416.

The product of its digits is 9216, while the sum is 28.

The square root of 42823423 is about 6543.9608036723. The cubic root of 42823423 is about 349.8595981073.

The spelling of 42823423 in words is "forty-two million, eight hundred twenty-three thousand, four hundred twenty-three".