509344447 has 2 divisors, whose sum is σ = 509344448. Its totient is φ = 509344446.

The previous prime is 509344441. The next prime is 509344471. The reversal of 509344447 is 744443905.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 509344447 - 2³ = 509344439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509344441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254672223 + 254672224.

It is an arithmetic number, because the mean of its divisors is an integer number (254672224).

Almost surely, 2^509344447 is an apocalyptic number.

509344447 is a deficient number, since it is larger than the sum of its proper divisors (1).

509344447 is an equidigital number, since it uses as much as digits as its factorization.

509344447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 40.

The square root of 509344447 is about 22568.6607267689. The cubic root of 509344447 is about 798.6145013563.

The spelling of 509344447 in words is "five hundred nine million, three hundred forty-four thousand, four hundred forty-seven".