1867213 has 2 divisors, whose sum is σ = 1867214. Its totient is φ = 1867212.

The previous prime is 1867211. The next prime is 1867219. The reversal of 1867213 is 3127681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1671849 + 195364 = 1293^2 + 442^2 .

It is an emirp because it is prime and its reverse (3127681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1867213 - 2¹ = 1867211 is a prime.

Together with 1867211, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1867211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 933606 + 933607.

It is an arithmetic number, because the mean of its divisors is an integer number (933607).

2^1867213 is an apocalyptic number.

It is an amenable number.

1867213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1867213 is an equidigital number, since it uses as much as digits as its factorization.

1867213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 1867213 is about 1366.4600250282. The cubic root of 1867213 is about 123.1396611330.

It can be divided in two parts, 1867 and 213, that added together give a triangular number (2080 = T₆₄).

The spelling of 1867213 in words is "one million, eight hundred sixty-seven thousand, two hundred thirteen".