1640017 has 2 divisors, whose sum is σ = 1640018. Its totient is φ = 1640016.

The previous prime is 1639999. The next prime is 1640021. The reversal of 1640017 is 7100461.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1218816 + 421201 = 1104^2 + 649^2 .

It is a cyclic number.

It is not a de Polignac number, because 1640017 - 2⁷ = 1639889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1639976 and 1640003.

It is not a weakly prime, because it can be changed into another prime (1640057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820008 + 820009.

It is an arithmetic number, because the mean of its divisors is an integer number (820009).

2^1640017 is an apocalyptic number.

It is an amenable number.

1640017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1640017 is an equidigital number, since it uses as much as digits as its factorization.

1640017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 1640017 is about 1280.6314848542. The cubic root of 1640017 is about 117.9277782706.

Adding to 1640017 its reverse (7100461), we get a palindrome (8740478).

The spelling of 1640017 in words is "one million, six hundred forty thousand, seventeen".