1916585213 has 2 divisors, whose sum is σ = 1916585214. Its totient is φ = 1916585212.

The previous prime is 1916585197. The next prime is 1916585243. The reversal of 1916585213 is 3125856191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1224790009 + 691795204 = 34997^2 + 26302^2 .

It is a cyclic number.

It is not a de Polignac number, because 1916585213 - 2⁴ = 1916585197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1916585243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958292606 + 958292607.

It is an arithmetic number, because the mean of its divisors is an integer number (958292607).

Almost surely, 2^1916585213 is an apocalyptic number.

It is an amenable number.

1916585213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916585213 is an equidigital number, since it uses as much as digits as its factorization.

1916585213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 41.

The square root of 1916585213 is about 43778.8215122335. The cubic root of 1916585213 is about 1242.1557222570.

The spelling of 1916585213 in words is "one billion, nine hundred sixteen million, five hundred eighty-five thousand, two hundred thirteen".