450155491 has 2 divisors, whose sum is σ = 450155492. Its totient is φ = 450155490.

The previous prime is 450155479. The next prime is 450155551. The reversal of 450155491 is 194551054.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 450155491 - 2¹¹ = 450153443 is a prime.

It is equal to p_23860744 and since 450155491 and 23860744 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (450155401) 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, 225077745 + 225077746.

It is an arithmetic number, because the mean of its divisors is an integer number (225077746).

Almost surely, 2^450155491 is an apocalyptic number.

450155491 is a deficient number, since it is larger than the sum of its proper divisors (1).

450155491 is an equidigital number, since it uses as much as digits as its factorization.

450155491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 450155491 is about 21216.8680770749. The cubic root of 450155491 is about 766.3976846147.

The spelling of 450155491 in words is "four hundred fifty million, one hundred fifty-five thousand, four hundred ninety-one".