1890788213 has 2 divisors, whose sum is σ = 1890788214. Its totient is φ = 1890788212.

The previous prime is 1890788203. The next prime is 1890788219. The reversal of 1890788213 is 3128870981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1847452324 + 43335889 = 42982^2 + 6583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1890788213 - 2¹⁰ = 1890787189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1890788219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945394106 + 945394107.

It is an arithmetic number, because the mean of its divisors is an integer number (945394107).

Almost surely, 2^1890788213 is an apocalyptic number.

It is an amenable number.

1890788213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1890788213 is an equidigital number, since it uses as much as digits as its factorization.

1890788213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 1890788213 is about 43483.1946043526. The cubic root of 1890788213 is about 1236.5574417506.

The spelling of 1890788213 in words is "one billion, eight hundred ninety million, seven hundred eighty-eight thousand, two hundred thirteen".