1948609 has 4 divisors (see below), whose sum is σ = 2098516. Its totient is φ = 1798704.

The previous prime is 1948603. The next prime is 1948613. The reversal of 1948609 is 9068491.

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 1040400 + 908209 = 1020^2 + 953^2 .

It is a cyclic number.

It is not a de Polignac number, because 1948609 - 2³ = 1948601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1948601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74934 + ... + 74959.

It is an arithmetic number, because the mean of its divisors is an integer number (524629).

2^1948609 is an apocalyptic number.

It is an amenable number.

1948609 is a deficient number, since it is larger than the sum of its proper divisors (149907).

1948609 is a wasteful number, since it uses less digits than its factorization.

1948609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149906.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1948609 is about 1395.9258576300. The cubic root of 1948609 is about 124.9035843179.

The spelling of 1948609 in words is "one million, nine hundred forty-eight thousand, six hundred nine".