12393851 has 2 divisors, whose sum is σ = 12393852. Its totient is φ = 12393850.

The previous prime is 12393791. The next prime is 12393859. The reversal of 12393851 is 15839321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12393851 - 2¹⁰ = 12392827 is a prime.

It is a super-2 number, since 2×12393851² = 307215085220402, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12393859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6196925 + 6196926.

It is an arithmetic number, because the mean of its divisors is an integer number (6196926).

Almost surely, 2^12393851 is an apocalyptic number.

12393851 is a deficient number, since it is larger than the sum of its proper divisors (1).

12393851 is an equidigital number, since it uses as much as digits as its factorization.

12393851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 12393851 is about 3520.4901647356. The cubic root of 12393851 is about 231.4206399652.

The spelling of 12393851 in words is "twelve million, three hundred ninety-three thousand, eight hundred fifty-one".