404040444397 has 2 divisors, whose sum is σ = 404040444398. Its totient is φ = 404040444396.

The previous prime is 404040444391. The next prime is 404040444419. The reversal of 404040444397 is 793444040404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376104999076 + 27935445321 = 613274^2 + 167139^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404040444397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404040444391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202020222198 + 202020222199.

It is an arithmetic number, because the mean of its divisors is an integer number (202020222199).

Almost surely, 2^404040444397 is an apocalyptic number.

It is an amenable number.

404040444397 is a deficient number, since it is larger than the sum of its proper divisors (1).

404040444397 is an equidigital number, since it uses as much as digits as its factorization.

404040444397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 43.

The spelling of 404040444397 in words is "four hundred four billion, forty million, four hundred forty-four thousand, three hundred ninety-seven".