451144489 has 2 divisors, whose sum is σ = 451144490. Its totient is φ = 451144488.

The previous prime is 451144411. The next prime is 451144523. The reversal of 451144489 is 984441154.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 451137600 + 6889 = 21240^2 + 83^2 .

It is a cyclic number.

It is not a de Polignac number, because 451144489 - 2²¹ = 449047337 is a prime.

It is a super-2 number, since 2×451144489² = 407062699910142242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (451141489) 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, 225572244 + 225572245.

It is an arithmetic number, because the mean of its divisors is an integer number (225572245).

Almost surely, 2^451144489 is an apocalyptic number.

It is an amenable number.

451144489 is a deficient number, since it is larger than the sum of its proper divisors (1).

451144489 is an equidigital number, since it uses as much as digits as its factorization.

451144489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 40.

The square root of 451144489 is about 21240.1621698141. The cubic root of 451144489 is about 766.9585362773.

The spelling of 451144489 in words is "four hundred fifty-one million, one hundred forty-four thousand, four hundred eighty-nine".