1000440457 has 2 divisors, whose sum is σ = 1000440458. Its totient is φ = 1000440456.

The previous prime is 1000440439. The next prime is 1000440473. The reversal of 1000440457 is 7540440001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 939974281 + 60466176 = 30659^2 + 7776^2 .

It is an emirp because it is prime and its reverse (7540440001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1000440457 - 2¹⁵ = 1000407689 is a prime.

It is a super-2 number, since 2×1000440457² = 2001762216004737698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1000441457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500220228 + 500220229.

It is an arithmetic number, because the mean of its divisors is an integer number (500220229).

Almost surely, 2^1000440457 is an apocalyptic number.

It is an amenable number.

1000440457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000440457 is an equidigital number, since it uses as much as digits as its factorization.

1000440457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 1000440457 is about 31629.7400716478. The cubic root of 1000440457 is about 1000.1467974495.

Adding to 1000440457 its reverse (7540440001), we get a palindrome (8540880458).

The spelling of 1000440457 in words is "one billion, four hundred forty thousand, four hundred fifty-seven".