451500409 has 2 divisors, whose sum is σ = 451500410. Its totient is φ = 451500408.

The previous prime is 451500407. The next prime is 451500437. The reversal of 451500409 is 904005154.

It is an a-pointer prime, because the next prime (451500437) can be obtained adding 451500409 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297045225 + 154455184 = 17235^2 + 12428^2 .

It is a cyclic number.

It is not a de Polignac number, because 451500409 - 2¹ = 451500407 is a prime.

Together with 451500407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (451500407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225750204 + 225750205.

It is an arithmetic number, because the mean of its divisors is an integer number (225750205).

Almost surely, 2^451500409 is an apocalyptic number.

It is an amenable number.

451500409 is a deficient number, since it is larger than the sum of its proper divisors (1).

451500409 is an equidigital number, since it uses as much as digits as its factorization.

451500409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 451500409 is about 21248.5389850691. The cubic root of 451500409 is about 767.1601746543.

The spelling of 451500409 in words is "four hundred fifty-one million, five hundred thousand, four hundred nine".