451430209 has 2 divisors, whose sum is σ = 451430210. Its totient is φ = 451430208.

The previous prime is 451430201. The next prime is 451430249. The reversal of 451430209 is 902034154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436684609 + 14745600 = 20897^2 + 3840^2 .

It is a cyclic number.

It is not a de Polignac number, because 451430209 - 2³ = 451430201 is a prime.

It is not a weakly prime, because it can be changed into another prime (451430201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225715104 + 225715105.

It is an arithmetic number, because the mean of its divisors is an integer number (225715105).

Almost surely, 2^451430209 is an apocalyptic number.

It is an amenable number.

451430209 is a deficient number, since it is larger than the sum of its proper divisors (1).

451430209 is an equidigital number, since it uses as much as digits as its factorization.

451430209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 451430209 is about 21246.8870425764. The cubic root of 451430209 is about 767.1204128331.

The spelling of 451430209 in words is "four hundred fifty-one million, four hundred thirty thousand, two hundred nine".