450198457 has 2 divisors, whose sum is σ = 450198458. Its totient is φ = 450198456.

The previous prime is 450198439. The next prime is 450198493. The reversal of 450198457 is 754891054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383024041 + 67174416 = 19571^2 + 8196^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450198457 is a prime.

It is not a weakly prime, because it can be changed into another prime (450198157) 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, 225099228 + 225099229.

It is an arithmetic number, because the mean of its divisors is an integer number (225099229).

Almost surely, 2^450198457 is an apocalyptic number.

It is an amenable number.

450198457 is a deficient number, since it is larger than the sum of its proper divisors (1).

450198457 is an equidigital number, since it uses as much as digits as its factorization.

450198457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 450198457 is about 21217.8805963272. The cubic root of 450198457 is about 766.4220672973.

The spelling of 450198457 in words is "four hundred fifty million, one hundred ninety-eight thousand, four hundred fifty-seven".