423722081 has 4 divisors (see below), whose sum is σ = 423814932. Its totient is φ = 423629232.

The previous prime is 423722071. The next prime is 423722083. The reversal of 423722081 is 180227324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 314707600 + 109014481 = 17740^2 + 10441^2 .

It is a cyclic number.

It is not a de Polignac number, because 423722081 - 2⁶ = 423722017 is a prime.

It is a super-2 number, since 2×423722081² = 359080803853941122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423722083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39206 + ... + 48831.

It is an arithmetic number, because the mean of its divisors is an integer number (105953733).

Almost surely, 2^423722081 is an apocalyptic number.

It is an amenable number.

423722081 is a deficient number, since it is larger than the sum of its proper divisors (92851).

423722081 is an equidigital number, since it uses as much as digits as its factorization.

423722081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92850.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 423722081 is about 20584.5107058681. The cubic root of 423722081 is about 751.0929729583.

The spelling of 423722081 in words is "four hundred twenty-three million, seven hundred twenty-two thousand, eighty-one".