430640849 has 2 divisors, whose sum is σ = 430640850. Its totient is φ = 430640848.

The previous prime is 430640827. The next prime is 430640857. The reversal of 430640849 is 948046034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 296080849 + 134560000 = 17207^2 + 11600^2 .

It is a cyclic number.

It is not a de Polignac number, because 430640849 - 2⁸ = 430640593 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (430660849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215320424 + 215320425.

It is an arithmetic number, because the mean of its divisors is an integer number (215320425).

Almost surely, 2^430640849 is an apocalyptic number.

It is an amenable number.

430640849 is a deficient number, since it is larger than the sum of its proper divisors (1).

430640849 is an equidigital number, since it uses as much as digits as its factorization.

430640849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 430640849 is about 20751.8878418326. The cubic root of 430640849 is about 755.1590086565.

The spelling of 430640849 in words is "four hundred thirty million, six hundred forty thousand, eight hundred forty-nine".