1912213 has 2 divisors, whose sum is σ = 1912214. Its totient is φ = 1912212.

The previous prime is 1912193. The next prime is 1912241. The reversal of 1912213 is 3122191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1004004 + 908209 = 1002^2 + 953^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1912213 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 (1912283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956106 + 956107.

It is an arithmetic number, because the mean of its divisors is an integer number (956107).

2^1912213 is an apocalyptic number.

It is an amenable number.

1912213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1912213 is an equidigital number, since it uses as much as digits as its factorization.

1912213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 19.

The square root of 1912213 is about 1382.8278996318. The cubic root of 1912213 is about 124.1210446530.

The spelling of 1912213 in words is "one million, nine hundred twelve thousand, two hundred thirteen".