1894213 has 2 divisors, whose sum is σ = 1894214. Its totient is φ = 1894212.

The previous prime is 1894181. The next prime is 1894229. The reversal of 1894213 is 3124981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1542564 + 351649 = 1242^2 + 593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1894213 - 2⁵ = 1894181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1894253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 947106 + 947107.

It is an arithmetic number, because the mean of its divisors is an integer number (947107).

2^1894213 is an apocalyptic number.

It is an amenable number.

1894213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1894213 is an equidigital number, since it uses as much as digits as its factorization.

1894213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 1894213 is about 1376.3041088364. The cubic root of 1894213 is about 123.7303584104.

Subtracting from 1894213 its product of digits (1728), we obtain a triangular number (1892485 = T₁₉₄₅).

The spelling of 1894213 in words is "one million, eight hundred ninety-four thousand, two hundred thirteen".