418874921 has 2 divisors, whose sum is σ = 418874922. Its totient is φ = 418874920.

The previous prime is 418874899. The next prime is 418875001. The reversal of 418874921 is 129478814.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354794896 + 64080025 = 18836^2 + 8005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-418874921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (418874021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209437460 + 209437461.

It is an arithmetic number, because the mean of its divisors is an integer number (209437461).

Almost surely, 2^418874921 is an apocalyptic number.

It is an amenable number.

418874921 is a deficient number, since it is larger than the sum of its proper divisors (1).

418874921 is an equidigital number, since it uses as much as digits as its factorization.

418874921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 44.

The square root of 418874921 is about 20466.4340079067. The cubic root of 418874921 is about 748.2179444652.

The spelling of 418874921 in words is "four hundred eighteen million, eight hundred seventy-four thousand, nine hundred twenty-one".