450415909 has 2 divisors, whose sum is σ = 450415910. Its totient is φ = 450415908.

The previous prime is 450415871. The next prime is 450415921. The reversal of 450415909 is 909514054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 375506884 + 74909025 = 19378^2 + 8655^2 .

It is a cyclic number.

It is not a de Polignac number, because 450415909 - 2⁹ = 450415397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450415949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225207954 + 225207955.

It is an arithmetic number, because the mean of its divisors is an integer number (225207955).

Almost surely, 2^450415909 is an apocalyptic number.

It is an amenable number.

450415909 is a deficient number, since it is larger than the sum of its proper divisors (1).

450415909 is an equidigital number, since it uses as much as digits as its factorization.

450415909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 450415909 is about 21223.0042406819. The cubic root of 450415909 is about 766.5454448751.

The spelling of 450415909 in words is "four hundred fifty million, four hundred fifteen thousand, nine hundred nine".