423120013 has 4 divisors (see below), whose sum is σ = 424375900. Its totient is φ = 421864128.

The previous prime is 423119999. The next prime is 423120017. The reversal of 423120013 is 310021324.

It is a happy number.

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 296287369 + 126832644 = 17213^2 + 11262^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423120013 is a prime.

It is a super-2 number, since 2×423120013² = 358061090802240338, 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 (423120017) 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, 627438 + ... + 628111.

It is an arithmetic number, because the mean of its divisors is an integer number (106093975).

Almost surely, 2^423120013 is an apocalyptic number.

It is an amenable number.

423120013 is a deficient number, since it is larger than the sum of its proper divisors (1255887).

423120013 is a wasteful number, since it uses less digits than its factorization.

423120013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255886.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 423120013 is about 20569.8812101577. The cubic root of 423120013 is about 750.7370608992.

Adding to 423120013 its reverse (310021324), we get a palindrome (733141337).

The spelling of 423120013 in words is "four hundred twenty-three million, one hundred twenty thousand, thirteen".