2185691059 has 2 divisors, whose sum is σ = 2185691060. Its totient is φ = 2185691058.

The previous prime is 2185690993. The next prime is 2185691069. The reversal of 2185691059 is 9501965812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2185691059 - 2⁹ = 2185690547 is a prime.

It is not a weakly prime, because it can be changed into another prime (2185691069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092845529 + 1092845530.

It is an arithmetic number, because the mean of its divisors is an integer number (1092845530).

Almost surely, 2^2185691059 is an apocalyptic number.

2185691059 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185691059 is an equidigital number, since it uses as much as digits as its factorization.

2185691059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 46.

The square root of 2185691059 is about 46751.3749423480. The cubic root of 2185691059 is about 1297.7656014322.

The spelling of 2185691059 in words is "two billion, one hundred eighty-five million, six hundred ninety-one thousand, fifty-nine".