451013209 has 2 divisors, whose sum is σ = 451013210. Its totient is φ = 451013208.

The previous prime is 451013183. The next prime is 451013221. The reversal of 451013209 is 902310154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286455625 + 164557584 = 16925^2 + 12828^2 .

It is a cyclic number.

It is not a de Polignac number, because 451013209 - 2¹⁷ = 450882137 is a prime.

It is not a weakly prime, because it can be changed into another prime (451013309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225506604 + 225506605.

It is an arithmetic number, because the mean of its divisors is an integer number (225506605).

Almost surely, 2^451013209 is an apocalyptic number.

It is an amenable number.

451013209 is a deficient number, since it is larger than the sum of its proper divisors (1).

451013209 is an equidigital number, since it uses as much as digits as its factorization.

451013209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 451013209 is about 21237.0715730771. The cubic root of 451013209 is about 766.8841358084.

The spelling of 451013209 in words is "four hundred fifty-one million, thirteen thousand, two hundred nine".