1368191189 has 8 divisors (see below), whose sum is σ = 1381774680. Its totient is φ = 1354660096.

The previous prime is 1368191183. The next prime is 1368191207. The reversal of 1368191189 is 9811918631.

It can be written as a sum of positive squares in 4 ways, for example, as 302168689 + 1066022500 = 17383^2 + 32650^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1368191189 - 2⁸ = 1368190933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1368191183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40457 + ... + 66129.

It is an arithmetic number, because the mean of its divisors is an integer number (172721835).

Almost surely, 2^1368191189 is an apocalyptic number.

It is an amenable number.

1368191189 is a deficient number, since it is larger than the sum of its proper divisors (13583491).

1368191189 is a wasteful number, since it uses less digits than its factorization.

1368191189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26199.

The product of its digits is 93312, while the sum is 47.

The square root of 1368191189 is about 36989.0685067899. The cubic root of 1368191189 is about 1110.1515332987.

The spelling of 1368191189 in words is "one billion, three hundred sixty-eight million, one hundred ninety-one thousand, one hundred eighty-nine".