450616981 has 2 divisors, whose sum is σ = 450616982. Its totient is φ = 450616980.

The previous prime is 450616967. The next prime is 450616987. The reversal of 450616981 is 189616054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 382554481 + 68062500 = 19559^2 + 8250^2 .

It is a cyclic number.

It is not a de Polignac number, because 450616981 - 2⁵ = 450616949 is a prime.

It is a super-2 number, since 2×450616981² = 406111327131108722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450616987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225308490 + 225308491.

It is an arithmetic number, because the mean of its divisors is an integer number (225308491).

Almost surely, 2^450616981 is an apocalyptic number.

It is an amenable number.

450616981 is a deficient number, since it is larger than the sum of its proper divisors (1).

450616981 is an equidigital number, since it uses as much as digits as its factorization.

450616981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 450616981 is about 21227.7408359910. The cubic root of 450616981 is about 766.6594934637.

The spelling of 450616981 in words is "four hundred fifty million, six hundred sixteen thousand, nine hundred eighty-one".