1985317 has 2 divisors, whose sum is σ = 1985318. Its totient is φ = 1985316.

The previous prime is 1985303. The next prime is 1985363. The reversal of 1985317 is 7135891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1985281 + 36 = 1409^2 + 6^2 .

It is a cyclic number.

It is not a de Polignac number, because 1985317 - 2⁷ = 1985189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1985377) 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 as a sum of consecutive naturals, namely, 992658 + 992659.

It is an arithmetic number, because the mean of its divisors is an integer number (992659).

2^1985317 is an apocalyptic number.

It is an amenable number.

1985317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1985317 is an equidigital number, since it uses as much as digits as its factorization.

1985317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 34.

The square root of 1985317 is about 1409.0127749598. The cubic root of 1985317 is about 125.6830236979.

The spelling of 1985317 in words is "one million, nine hundred eighty-five thousand, three hundred seventeen".