1629889 has 4 divisors (see below), whose sum is σ = 1641924. Its totient is φ = 1617856.

The previous prime is 1629869. The next prime is 1629893. The reversal of 1629889 is 9889261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1399489 + 230400 = 1183^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 1629889 - 2⁹ = 1629377 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1629809) 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 in 3 ways as a sum of consecutive naturals, for example, 5812 + ... + 6085.

It is an arithmetic number, because the mean of its divisors is an integer number (410481).

2^1629889 is an apocalyptic number.

It is an amenable number.

1629889 is a deficient number, since it is larger than the sum of its proper divisors (12035).

1629889 is a wasteful number, since it uses less digits than its factorization.

1629889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12034.

The product of its digits is 62208, while the sum is 43.

The square root of 1629889 is about 1276.6710617853. The cubic root of 1629889 is about 117.6845207023.

The spelling of 1629889 in words is "one million, six hundred twenty-nine thousand, eight hundred eighty-nine".