1806313 has 2 divisors, whose sum is σ = 1806314. Its totient is φ = 1806312.

The previous prime is 1806281. The next prime is 1806331. The reversal of 1806313 is 3136081.

Together with next prime (1806331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1734489 + 71824 = 1317^2 + 268^2 .

It is a cyclic number.

It is not a de Polignac number, because 1806313 - 2⁵ = 1806281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1806353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 903156 + 903157.

It is an arithmetic number, because the mean of its divisors is an integer number (903157).

2^1806313 is an apocalyptic number.

It is an amenable number.

1806313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1806313 is an equidigital number, since it uses as much as digits as its factorization.

1806313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1806313 is about 1343.9914434251. The cubic root of 1806313 is about 121.7860848729.

The spelling of 1806313 in words is "one million, eight hundred six thousand, three hundred thirteen".