451921469 has 2 divisors, whose sum is σ = 451921470. Its totient is φ = 451921468.

The previous prime is 451921453. The next prime is 451921487. The reversal of 451921469 is 964129154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 343657444 + 108264025 = 18538^2 + 10405^2 .

It is a cyclic number.

It is not a de Polignac number, because 451921469 - 2⁴ = 451921453 is a prime.

It is a super-2 number, since 2×451921469² = 408466028286235922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (451921429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225960734 + 225960735.

It is an arithmetic number, because the mean of its divisors is an integer number (225960735).

Almost surely, 2^451921469 is an apocalyptic number.

It is an amenable number.

451921469 is a deficient number, since it is larger than the sum of its proper divisors (1).

451921469 is an equidigital number, since it uses as much as digits as its factorization.

451921469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 451921469 is about 21258.4446514791. Note that the first 3 decimals coincide. The cubic root of 451921469 is about 767.3985798286.

The spelling of 451921469 in words is "four hundred fifty-one million, nine hundred twenty-one thousand, four hundred sixty-nine".