418504321 has 2 divisors, whose sum is σ = 418504322. Its totient is φ = 418504320.

The previous prime is 418504291. The next prime is 418504349. The reversal of 418504321 is 123405814.

It is an a-pointer prime, because the next prime (418504349) can be obtained adding 418504321 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417630096 + 874225 = 20436^2 + 935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-418504321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 418504321.

It is not a weakly prime, because it can be changed into another prime (418504391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209252160 + 209252161.

It is an arithmetic number, because the mean of its divisors is an integer number (209252161).

Almost surely, 2^418504321 is an apocalyptic number.

It is an amenable number.

418504321 is a deficient number, since it is larger than the sum of its proper divisors (1).

418504321 is an equidigital number, since it uses as much as digits as its factorization.

418504321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 418504321 is about 20457.3781555702. The cubic root of 418504321 is about 747.9972171677.

The spelling of 418504321 in words is "four hundred eighteen million, five hundred four thousand, three hundred twenty-one".