12400373 has 2 divisors, whose sum is σ = 12400374. Its totient is φ = 12400372.

The previous prime is 12400343. The next prime is 12400379. The reversal of 12400373 is 37300421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7279204 + 5121169 = 2698^2 + 2263^2 .

It is an emirp because it is prime and its reverse (37300421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12400373 - 2⁶ = 12400309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12400379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200186 + 6200187.

It is an arithmetic number, because the mean of its divisors is an integer number (6200187).

Almost surely, 2^12400373 is an apocalyptic number.

It is an amenable number.

12400373 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400373 is an equidigital number, since it uses as much as digits as its factorization.

12400373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 12400373 is about 3521.4163343746. The cubic root of 12400373 is about 231.4612262404.

Adding to 12400373 its reverse (37300421), we get a palindrome (49700794).

The spelling of 12400373 in words is "twelve million, four hundred thousand, three hundred seventy-three".