12017813 has 2 divisors, whose sum is σ = 12017814. Its totient is φ = 12017812.

The previous prime is 12017807. The next prime is 12017833. The reversal of 12017813 is 31871021.

It is a happy number.

12017813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11785489 + 232324 = 3433^2 + 482^2 .

It is a cyclic number.

It is not a de Polignac number, because 12017813 - 2⁶ = 12017749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12017833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6008906 + 6008907.

It is an arithmetic number, because the mean of its divisors is an integer number (6008907).

Almost surely, 2^12017813 is an apocalyptic number.

It is an amenable number.

12017813 is a deficient number, since it is larger than the sum of its proper divisors (1).

12017813 is an equidigital number, since it uses as much as digits as its factorization.

12017813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 12017813 is about 3466.6717467911. The cubic root of 12017813 is about 229.0560746975.

Adding to 12017813 its reverse (31871021), we get a palindrome (43888834).

The spelling of 12017813 in words is "twelve million, seventeen thousand, eight hundred thirteen".