1948209 has 4 divisors (see below), whose sum is σ = 2597616. Its totient is φ = 1298804.

The previous prime is 1948187. The next prime is 1948223. The reversal of 1948209 is 9028491.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1948209 - 2¹² = 1944113 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1948209.

It is not an unprimeable number, because it can be changed into a prime (1948229) 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, 324699 + ... + 324704.

It is an arithmetic number, because the mean of its divisors is an integer number (649404).

2^1948209 is an apocalyptic number.

It is an amenable number.

1948209 is a deficient number, since it is larger than the sum of its proper divisors (649407).

1948209 is an equidigital number, since it uses as much as digits as its factorization.

1948209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649406.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1948209 is about 1395.7825761916. The cubic root of 1948209 is about 124.8950372205.

The spelling of 1948209 in words is "one million, nine hundred forty-eight thousand, two hundred nine".