1640713 has 4 divisors (see below), whose sum is σ = 1653760. Its totient is φ = 1627668.

The previous prime is 1640701. The next prime is 1640729. The reversal of 1640713 is 3170461.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3170461 = 7 ⋅452923.

It is a cyclic number.

It is not a de Polignac number, because 1640713 - 2⁹ = 1640201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1640753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6333 + ... + 6586.

It is an arithmetic number, because the mean of its divisors is an integer number (413440).

2^1640713 is an apocalyptic number.

It is an amenable number.

1640713 is a deficient number, since it is larger than the sum of its proper divisors (13047).

1640713 is a wasteful number, since it uses less digits than its factorization.

1640713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13046.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1640713 is about 1280.9031969669. The cubic root of 1640713 is about 117.9444582045.

The spelling of 1640713 in words is "one million, six hundred forty thousand, seven hundred thirteen".