1640313 has 24 divisors (see below), whose sum is σ = 2560896. Its totient is φ = 1008000.

The previous prime is 1640311. The next prime is 1640323. The reversal of 1640313 is 3130461.

It is not a de Polignac number, because 1640313 - 2¹ = 1640311 is a prime.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1640311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10788 + ... + 10938.

It is an arithmetic number, because the mean of its divisors is an integer number (106704).

2^1640313 is an apocalyptic number.

It is an amenable number.

1640313 is a deficient number, since it is larger than the sum of its proper divisors (920583).

1640313 is a wasteful number, since it uses less digits than its factorization.

1640313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 242 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1640313 is about 1280.7470476249. The cubic root of 1640313 is about 117.9348726122.

Adding to 1640313 its reverse (3130461), we get a palindrome (4770774).

It can be divided in two parts, 1640 and 313, that added together give a triangular number (1953 = T₆₂).

The spelling of 1640313 in words is "one million, six hundred forty thousand, three hundred thirteen".