1836361897 has 2 divisors, whose sum is σ = 1836361898. Its totient is φ = 1836361896.

The previous prime is 1836361847. The next prime is 1836361903. The reversal of 1836361897 is 7981636381.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1262807296 + 573554601 = 35536^2 + 23949^2 .

It is an emirp because it is prime and its reverse (7981636381) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1836361897 - 2²³ = 1827973289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1836361847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 918180948 + 918180949.

It is an arithmetic number, because the mean of its divisors is an integer number (918180949).

Almost surely, 2^1836361897 is an apocalyptic number.

It is an amenable number.

1836361897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1836361897 is an equidigital number, since it uses as much as digits as its factorization.

1836361897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 52.

The square root of 1836361897 is about 42852.7933395246. The cubic root of 1836361897 is about 1224.5769794692.

The spelling of 1836361897 in words is "one billion, eight hundred thirty-six million, three hundred sixty-one thousand, eight hundred ninety-seven".