404304425021309 has 2 divisors, whose sum is σ = 404304425021310. Its totient is φ = 404304425021308.

The previous prime is 404304425021267. The next prime is 404304425021353. The reversal of 404304425021309 is 903120524403404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325727777284900 + 78576647736409 = 18047930^2 + 8864347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404304425021309 is a prime.

It is a super-2 number, since 2×404304425021309² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404304425021389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202152212510654 + 202152212510655.

It is an arithmetic number, because the mean of its divisors is an integer number (202152212510655).

Almost surely, 2^{404304425021309} is an apocalyptic number.

It is an amenable number.

404304425021309 is a deficient number, since it is larger than the sum of its proper divisors (1).

404304425021309 is an equidigital number, since it uses as much as digits as its factorization.

404304425021309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 404304425021309 in words is "four hundred four trillion, three hundred four billion, four hundred twenty-five million, twenty-one thousand, three hundred nine".