10440340397 has 2 divisors, whose sum is σ = 10440340398. Its totient is φ = 10440340396.

The previous prime is 10440340349. The next prime is 10440340429. The reversal of 10440340397 is 79304304401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10426247881 + 14092516 = 102109^2 + 3754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10440340397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10440340307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5220170198 + 5220170199.

It is an arithmetic number, because the mean of its divisors is an integer number (5220170199).

Almost surely, 2^10440340397 is an apocalyptic number.

It is an amenable number.

10440340397 is a deficient number, since it is larger than the sum of its proper divisors (1).

10440340397 is an equidigital number, since it uses as much as digits as its factorization.

10440340397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

Adding to 10440340397 its reverse (79304304401), we get a palindrome (89744644798).

The spelling of 10440340397 in words is "ten billion, four hundred forty million, three hundred forty thousand, three hundred ninety-seven".