1863313 has 2 divisors, whose sum is σ = 1863314. Its totient is φ = 1863312.

The previous prime is 1863307. The next prime is 1863331. The reversal of 1863313 is 3133681.

It is a happy number.

Together with next prime (1863331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1557504 + 305809 = 1248^2 + 553^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1863313 is a prime.

1863313 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1863413) 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, 931656 + 931657.

It is an arithmetic number, because the mean of its divisors is an integer number (931657).

2^1863313 is an apocalyptic number.

It is an amenable number.

1863313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1863313 is an equidigital number, since it uses as much as digits as its factorization.

1863313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 25.

The square root of 1863313 is about 1365.0322340516. The cubic root of 1863313 is about 123.0538684882.

Adding to 1863313 its reverse (3133681), we get a palindrome (4996994).

The spelling of 1863313 in words is "one million, eight hundred sixty-three thousand, three hundred thirteen".