423631573 has 4 divisors (see below), whose sum is σ = 424547008. Its totient is φ = 422716140.

The previous prime is 423631567. The next prime is 423631589. The reversal of 423631573 is 375136324.

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 423631573 - 2⁵ = 423631541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423637573) 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, 457023 + ... + 457948.

It is an arithmetic number, because the mean of its divisors is an integer number (106136752).

Almost surely, 2^423631573 is an apocalyptic number.

It is an amenable number.

423631573 is a deficient number, since it is larger than the sum of its proper divisors (915435).

423631573 is an equidigital number, since it uses as much as digits as its factorization.

423631573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915434.

The product of its digits is 45360, while the sum is 34.

The square root of 423631573 is about 20582.3121393103. The cubic root of 423631573 is about 751.0394907612.

Adding to 423631573 its reverse (375136324), we get a palindrome (798767897).

The spelling of 423631573 in words is "four hundred twenty-three million, six hundred thirty-one thousand, five hundred seventy-three".