1868361113 has 2 divisors, whose sum is σ = 1868361114. Its totient is φ = 1868361112.

The previous prime is 1868361109. The next prime is 1868361119. The reversal of 1868361113 is 3111638681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1591371664 + 276989449 = 39892^2 + 16643^2 .

It is an emirp because it is prime and its reverse (3111638681) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1868361113 - 2² = 1868361109 is a prime.

It is not a weakly prime, because it can be changed into another prime (1868361119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934180556 + 934180557.

It is an arithmetic number, because the mean of its divisors is an integer number (934180557).

Almost surely, 2^1868361113 is an apocalyptic number.

It is an amenable number.

1868361113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868361113 is an equidigital number, since it uses as much as digits as its factorization.

1868361113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 1868361113 is about 43224.5429472655. The cubic root of 1868361113 is about 1231.6489469035.

Adding to 1868361113 its reverse (3111638681), we get a palindrome (4979999794).

The spelling of 1868361113 in words is "one billion, eight hundred sixty-eight million, three hundred sixty-one thousand, one hundred thirteen".