12081913 has 2 divisors, whose sum is σ = 12081914. Its totient is φ = 12081912.

The previous prime is 12081899. The next prime is 12081919. The reversal of 12081913 is 31918021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10705984 + 1375929 = 3272^2 + 1173^2 .

It is a cyclic number.

It is not a de Polignac number, because 12081913 - 2⁹ = 12081401 is a prime.

It is not a weakly prime, because it can be changed into another prime (12081919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6040956 + 6040957.

It is an arithmetic number, because the mean of its divisors is an integer number (6040957).

Almost surely, 2^12081913 is an apocalyptic number.

It is an amenable number.

12081913 is a deficient number, since it is larger than the sum of its proper divisors (1).

12081913 is an equidigital number, since it uses as much as digits as its factorization.

12081913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 12081913 is about 3475.9046304523. The cubic root of 12081913 is about 229.4625953409.

Adding to 12081913 its reverse (31918021), we get a palindrome (43999934).

The spelling of 12081913 in words is "twelve million, eighty-one thousand, nine hundred thirteen".