42823447 has 4 divisors (see below), whose sum is σ = 44685360. Its totient is φ = 40961536.

The previous prime is 42823421. The next prime is 42823453. The reversal of 42823447 is 74432824.

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 42823447 - 2¹¹ = 42821399 is a prime.

It is a super-2 number, since 2×42823447² = 3667695225923618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42823247) 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, 930922 + ... + 930967.

It is an arithmetic number, because the mean of its divisors is an integer number (11171340).

Almost surely, 2^42823447 is an apocalyptic number.

42823447 is a deficient number, since it is larger than the sum of its proper divisors (1861913).

42823447 is a wasteful number, since it uses less digits than its factorization.

42823447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1861912.

The product of its digits is 43008, while the sum is 34.

The square root of 42823447 is about 6543.9626374239. The cubic root of 42823447 is about 349.8596634659.

The spelling of 42823447 in words is "forty-two million, eight hundred twenty-three thousand, four hundred forty-seven".