1634489 has 2 divisors, whose sum is σ = 1634490. Its totient is φ = 1634488.

The previous prime is 1634471. The next prime is 1634497. The reversal of 1634489 is 9844361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1155625 + 478864 = 1075^2 + 692^2 .

It is an emirp because it is prime and its reverse (9844361) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1634489 - 2⁸ = 1634233 is a prime.

It is a super-2 number, since 2×1634489² = 5343108582242, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1634089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 817244 + 817245.

It is an arithmetic number, because the mean of its divisors is an integer number (817245).

2^1634489 is an apocalyptic number.

It is an amenable number.

1634489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1634489 is an equidigital number, since it uses as much as digits as its factorization.

1634489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 1634489 is about 1278.4713528273. The cubic root of 1634489 is about 117.7951295256.

The spelling of 1634489 in words is "one million, six hundred thirty-four thousand, four hundred eighty-nine".