421716049 has 2 divisors, whose sum is σ = 421716050. Its totient is φ = 421716048.

The previous prime is 421715977. The next prime is 421716079. The reversal of 421716049 is 940617124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385415424 + 36300625 = 19632^2 + 6025^2 .

It is a cyclic number.

It is not a de Polignac number, because 421716049 - 2¹¹ = 421714001 is a prime.

It is not a weakly prime, because it can be changed into another prime (421716079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210858024 + 210858025.

It is an arithmetic number, because the mean of its divisors is an integer number (210858025).

Almost surely, 2^421716049 is an apocalyptic number.

It is an amenable number.

421716049 is a deficient number, since it is larger than the sum of its proper divisors (1).

421716049 is an equidigital number, since it uses as much as digits as its factorization.

421716049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 421716049 is about 20535.7261619841. The cubic root of 421716049 is about 749.9057949825.

The spelling of 421716049 in words is "four hundred twenty-one million, seven hundred sixteen thousand, forty-nine".