1646089 has 3 divisors (see below), whose sum is σ = 1647373. Its totient is φ = 1644806.

The previous prime is 1646033. The next prime is 1646101. The reversal of 1646089 is 9806461.

The square root of 1646089 is 1283.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9806461 = 7 ⋅1400923.

It is not a de Polignac number, because 1646089 - 2⁷ = 1645961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1646189) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 642 + ... + 1924.

2^1646089 is an apocalyptic number.

1646089 is the 1283-rd square number.

1646089 is the 642-nd centered octagonal number.

It is an amenable number.

1646089 is a deficient number, since it is larger than the sum of its proper divisors (1284).

1646089 is an frugal number, since it uses more digits than its factorization.

1646089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566 (or 1283 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The cubic root of 1646089 is about 118.0731376525.

The spelling of 1646089 in words is "one million, six hundred forty-six thousand, eighty-nine".