2148689 has 4 divisors (see below), whose sum is σ = 2156724. Its totient is φ = 2140656.

The previous prime is 2148677. The next prime is 2148709. The reversal of 2148689 is 9868412.

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 1067089 + 1081600 = 1033^2 + 1040^2 .

It is not a de Polignac number, because 2148689 - 2¹⁶ = 2083153 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (2148649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3602 + ... + 4155.

It is an arithmetic number, because the mean of its divisors is an integer number (539181).

2^2148689 is an apocalyptic number.

It is an amenable number.

2148689 is a deficient number, since it is larger than the sum of its proper divisors (8035).

2148689 is an equidigital number, since it uses as much as digits as its factorization.

2148689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8034.

The product of its digits is 27648, while the sum is 38.

The square root of 2148689 is about 1465.8407144025. The cubic root of 2148689 is about 129.0400492601.

The spelling of 2148689 in words is "two million, one hundred forty-eight thousand, six hundred eighty-nine".