1391216193 has 6 divisors (see below), whose sum is σ = 2009534514. Its totient is φ = 927477456.

The previous prime is 1391216191. The next prime is 1391216213. The reversal of 1391216193 is 3916121931.

1391216193 is a `hidden beast` number, since 1 + 39 + 1 + 2 + 1 + 619 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1093757184 + 297459009 = 33072^2 + 17247^2 .

It is not a de Polignac number, because 1391216193 - 2¹ = 1391216191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1391216191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77289780 + ... + 77289797.

It is an arithmetic number, because the mean of its divisors is an integer number (334922419).

Almost surely, 2^1391216193 is an apocalyptic number.

It is an amenable number.

1391216193 is a deficient number, since it is larger than the sum of its proper divisors (618318321).

1391216193 is a wasteful number, since it uses less digits than its factorization.

1391216193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154579583 (or 154579580 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 1391216193 is about 37299.0106169051. The cubic root of 1391216193 is about 1116.3444253323.

The spelling of 1391216193 in words is "one billion, three hundred ninety-one million, two hundred sixteen thousand, one hundred ninety-three".