404430421453 has 2 divisors, whose sum is σ = 404430421454. Its totient is φ = 404430421452.

The previous prime is 404430421427. The next prime is 404430421501. The reversal of 404430421453 is 354124034404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 328573143369 + 75857278084 = 573213^2 + 275422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404430421453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404430461453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202215210726 + 202215210727.

It is an arithmetic number, because the mean of its divisors is an integer number (202215210727).

Almost surely, 2^404430421453 is an apocalyptic number.

It is an amenable number.

404430421453 is a deficient number, since it is larger than the sum of its proper divisors (1).

404430421453 is an equidigital number, since it uses as much as digits as its factorization.

404430421453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 34.

Adding to 404430421453 its reverse (354124034404), we get a palindrome (758554455857).

The spelling of 404430421453 in words is "four hundred four billion, four hundred thirty million, four hundred twenty-one thousand, four hundred fifty-three".