423442073 has 4 divisors (see below), whose sum is σ = 423488820. Its totient is φ = 423395328.

The previous prime is 423442043. The next prime is 423442091. The reversal of 423442073 is 370244324.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 307406089 + 116035984 = 17533^2 + 10772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423442073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (423442043) 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, 4940 + ... + 29517.

It is an arithmetic number, because the mean of its divisors is an integer number (105872205).

Almost surely, 2^423442073 is an apocalyptic number.

It is an amenable number.

423442073 is a deficient number, since it is larger than the sum of its proper divisors (46747).

423442073 is a wasteful number, since it uses less digits than its factorization.

423442073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46746.

The product of its (nonzero) digits is 16128, while the sum is 29.

The square root of 423442073 is about 20577.7081571296. The cubic root of 423442073 is about 750.9274883994.

Adding to 423442073 its reverse (370244324), we get a palindrome (793686397).

The spelling of 423442073 in words is "four hundred twenty-three million, four hundred forty-two thousand, seventy-three".