1068400189 has 2 divisors, whose sum is σ = 1068400190. Its totient is φ = 1068400188.

The previous prime is 1068400183. The next prime is 1068400247. The reversal of 1068400189 is 9810048601.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663062500 + 405337689 = 25750^2 + 20133^2 .

It is a cyclic number.

It is not a de Polignac number, because 1068400189 - 2⁷ = 1068400061 is a prime.

It is a super-2 number, since 2×1068400189² = 2282957927710471442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1068400183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534200094 + 534200095.

It is an arithmetic number, because the mean of its divisors is an integer number (534200095).

Almost surely, 2^1068400189 is an apocalyptic number.

It is an amenable number.

1068400189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1068400189 is an equidigital number, since it uses as much as digits as its factorization.

1068400189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 1068400189 is about 32686.3914955444. The cubic root of 1068400189 is about 1022.2991163281.

The spelling of 1068400189 in words is "one billion, sixty-eight million, four hundred thousand, one hundred eighty-nine".