450719021 has 2 divisors, whose sum is σ = 450719022. Its totient is φ = 450719020.

The previous prime is 450718981. The next prime is 450719029. The reversal of 450719021 is 120917054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424566025 + 26152996 = 20605^2 + 5114^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450719021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450719029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225359510 + 225359511.

It is an arithmetic number, because the mean of its divisors is an integer number (225359511).

Almost surely, 2^450719021 is an apocalyptic number.

It is an amenable number.

450719021 is a deficient number, since it is larger than the sum of its proper divisors (1).

450719021 is an equidigital number, since it uses as much as digits as its factorization.

450719021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 450719021 is about 21230.1441587192. The cubic root of 450719021 is about 766.7173578539.

The spelling of 450719021 in words is "four hundred fifty million, seven hundred nineteen thousand, twenty-one".