450118681 has 2 divisors, whose sum is σ = 450118682. Its totient is φ = 450118680.

The previous prime is 450118651. The next prime is 450118687. The reversal of 450118681 is 186811054.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 450118656 + 25 = 21216^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 450118681 - 2⁹ = 450118169 is a prime.

It is a super-2 number, since 2×450118681² = 405213653970359522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (450118687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225059340 + 225059341.

It is an arithmetic number, because the mean of its divisors is an integer number (225059341).

Almost surely, 2^450118681 is an apocalyptic number.

It is an amenable number.

450118681 is a deficient number, since it is larger than the sum of its proper divisors (1).

450118681 is an equidigital number, since it uses as much as digits as its factorization.

450118681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 34.

The square root of 450118681 is about 21216.0005891780. Note that the first 3 decimals coincide. The cubic root of 450118681 is about 766.3767941533.

The spelling of 450118681 in words is "four hundred fifty million, one hundred eighteen thousand, six hundred eighty-one".