451043491 has 2 divisors, whose sum is σ = 451043492. Its totient is φ = 451043490.

The previous prime is 451043449. The next prime is 451043503. The reversal of 451043491 is 194340154.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 451043491 - 2⁹ = 451042979 is a prime.

It is not a weakly prime, because it can be changed into another prime (451043401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225521745 + 225521746.

It is an arithmetic number, because the mean of its divisors is an integer number (225521746).

Almost surely, 2^451043491 is an apocalyptic number.

451043491 is a deficient number, since it is larger than the sum of its proper divisors (1).

451043491 is an equidigital number, since it uses as much as digits as its factorization.

451043491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 451043491 is about 21237.7845125145. The cubic root of 451043491 is about 766.9012988428.

The spelling of 451043491 in words is "four hundred fifty-one million, forty-three thousand, four hundred ninety-one".