451187489 has 2 divisors, whose sum is σ = 451187490. Its totient is φ = 451187488.

The previous prime is 451187461. The next prime is 451187507. The reversal of 451187489 is 984781154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318015889 + 133171600 = 17833^2 + 11540^2 .

It is a cyclic number.

It is not a de Polignac number, because 451187489 - 2²⁸ = 182752033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (451187459) 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, 225593744 + 225593745.

It is an arithmetic number, because the mean of its divisors is an integer number (225593745).

Almost surely, 2^451187489 is an apocalyptic number.

It is an amenable number.

451187489 is a deficient number, since it is larger than the sum of its proper divisors (1).

451187489 is an equidigital number, since it uses as much as digits as its factorization.

451187489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 322560, while the sum is 47.

The square root of 451187489 is about 21241.1743790215. The cubic root of 451187489 is about 766.9829025798.

The spelling of 451187489 in words is "four hundred fifty-one million, one hundred eighty-seven thousand, four hundred eighty-nine".