450787681 has 2 divisors, whose sum is σ = 450787682. Its totient is φ = 450787680.

The previous prime is 450787639. The next prime is 450787697. The reversal of 450787681 is 186787054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243859456 + 206928225 = 15616^2 + 14385^2 .

It is a cyclic number.

It is not a de Polignac number, because 450787681 - 2¹⁹ = 450263393 is a prime.

It is a super-2 number, since 2×450787681² = 406419066682715522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (450787781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225393840 + 225393841.

It is an arithmetic number, because the mean of its divisors is an integer number (225393841).

Almost surely, 2^450787681 is an apocalyptic number.

It is an amenable number.

450787681 is a deficient number, since it is larger than the sum of its proper divisors (1).

450787681 is an equidigital number, since it uses as much as digits as its factorization.

450787681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 450787681 is about 21231.7611375034. The cubic root of 450787681 is about 766.7562883468.

The spelling of 450787681 in words is "four hundred fifty million, seven hundred eighty-seven thousand, six hundred eighty-one".