457740809 has 2 divisors, whose sum is σ = 457740810. Its totient is φ = 457740808.

The previous prime is 457740737. The next prime is 457740817. The reversal of 457740809 is 908047754.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 451350025 + 6390784 = 21245^2 + 2528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-457740809 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 457740809.

It is not a weakly prime, because it can be changed into another prime (457740869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 228870404 + 228870405.

It is an arithmetic number, because the mean of its divisors is an integer number (228870405).

Almost surely, 2^457740809 is an apocalyptic number.

It is an amenable number.

457740809 is a deficient number, since it is larger than the sum of its proper divisors (1).

457740809 is an equidigital number, since it uses as much as digits as its factorization.

457740809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 457740809 is about 21394.8781020131. The cubic root of 457740809 is about 770.6784423633.

The spelling of 457740809 in words is "four hundred fifty-seven million, seven hundred forty thousand, eight hundred nine".