1807213 has 2 divisors, whose sum is σ = 1807214. Its totient is φ = 1807212.

The previous prime is 1807199. The next prime is 1807231. The reversal of 1807213 is 3127081.

Together with next prime (1807231) 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., 927369 + 879844 = 963^2 + 938^2 .

It is an emirp because it is prime and its reverse (3127081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1807213 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1807243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 903606 + 903607.

It is an arithmetic number, because the mean of its divisors is an integer number (903607).

2^1807213 is an apocalyptic number.

It is an amenable number.

1807213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1807213 is an equidigital number, since it uses as much as digits as its factorization.

1807213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 1807213 is about 1344.3262252891. The cubic root of 1807213 is about 121.8063082556.

The spelling of 1807213 in words is "one million, eight hundred seven thousand, two hundred thirteen".