12400144397 has 2 divisors, whose sum is σ = 12400144398. Its totient is φ = 12400144396.

The previous prime is 12400144357. The next prime is 12400144441. The reversal of 12400144397 is 79344100421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11754679561 + 645464836 = 108419^2 + 25406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12400144397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12400144357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200072198 + 6200072199.

It is an arithmetic number, because the mean of its divisors is an integer number (6200072199).

Almost surely, 2^12400144397 is an apocalyptic number.

It is an amenable number.

12400144397 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400144397 is an equidigital number, since it uses as much as digits as its factorization.

12400144397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 12400144397 in words is "twelve billion, four hundred million, one hundred forty-four thousand, three hundred ninety-seven".