1648949 has 4 divisors (see below), whose sum is σ = 1745964. Its totient is φ = 1551936.

The previous prime is 1648943. The next prime is 1648951. The reversal of 1648949 is 9498461.

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 628849 + 1020100 = 793^2 + 1010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1648949 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648943) 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, 48482 + ... + 48515.

It is an arithmetic number, because the mean of its divisors is an integer number (436491).

2^1648949 is an apocalyptic number.

It is an amenable number.

1648949 is a deficient number, since it is larger than the sum of its proper divisors (97015).

1648949 is an equidigital number, since it uses as much as digits as its factorization.

1648949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97014.

The product of its digits is 62208, while the sum is 41.

The square root of 1648949 is about 1284.1140915043. The cubic root of 1648949 is about 118.1414802086.

The spelling of 1648949 in words is "one million, six hundred forty-eight thousand, nine hundred forty-nine".