1868668897 has 2 divisors, whose sum is σ = 1868668898. Its totient is φ = 1868668896.

The previous prime is 1868668877. The next prime is 1868668939. The reversal of 1868668897 is 7988668681.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1635312721 + 233356176 = 40439^2 + 15276^2 .

It is a cyclic number.

It is not a de Polignac number, because 1868668897 - 2¹⁹ = 1868144609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1868668807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 934334448 + 934334449.

It is an arithmetic number, because the mean of its divisors is an integer number (934334449).

Almost surely, 2^1868668897 is an apocalyptic number.

It is an amenable number.

1868668897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1868668897 is an equidigital number, since it uses as much as digits as its factorization.

1868668897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55738368, while the sum is 67.

The square root of 1868668897 is about 43228.1030927798. The cubic root of 1868668897 is about 1231.7165749837.

The spelling of 1868668897 in words is "one billion, eight hundred sixty-eight million, six hundred sixty-eight thousand, eight hundred ninety-seven".