457839649 has 2 divisors, whose sum is σ = 457839650. Its totient is φ = 457839648.

The previous prime is 457839647. The next prime is 457839653. The reversal of 457839649 is 946938754.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 410670225 + 47169424 = 20265^2 + 6868^2 .

It is a cyclic number.

It is not a de Polignac number, because 457839649 - 2¹ = 457839647 is a prime.

Together with 457839647, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 457839649.

It is not a weakly prime, because it can be changed into another prime (457839647) 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, 228919824 + 228919825.

It is an arithmetic number, because the mean of its divisors is an integer number (228919825).

Almost surely, 2^457839649 is an apocalyptic number.

It is an amenable number.

457839649 is a deficient number, since it is larger than the sum of its proper divisors (1).

457839649 is an equidigital number, since it uses as much as digits as its factorization.

457839649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6531840, while the sum is 55.

The square root of 457839649 is about 21397.1878759803. The cubic root of 457839649 is about 770.7339092517.

The spelling of 457839649 in words is "four hundred fifty-seven million, eight hundred thirty-nine thousand, six hundred forty-nine".