423310767721 has 4 divisors (see below), whose sum is σ = 423907821700. Its totient is φ = 422713713744.

The previous prime is 423310767707. The next prime is 423310767779. The reversal of 423310767721 is 127767013324.

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 181629392400 + 241681375321 = 426180^2 + 491611^2 .

It is a cyclic number.

It is not a de Polignac number, because 423310767721 - 2¹⁷ = 423310636649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423310767791) 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, 298525926 + ... + 298527343.

It is an arithmetic number, because the mean of its divisors is an integer number (105976955425).

Almost surely, 2^423310767721 is an apocalyptic number.

It is an amenable number.

423310767721 is a deficient number, since it is larger than the sum of its proper divisors (597053979).

423310767721 is an equidigital number, since it uses as much as digits as its factorization.

423310767721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597053978.

The product of its (nonzero) digits is 296352, while the sum is 43.

The spelling of 423310767721 in words is "four hundred twenty-three billion, three hundred ten million, seven hundred sixty-seven thousand, seven hundred twenty-one".