1393216189 has 2 divisors, whose sum is σ = 1393216190. Its totient is φ = 1393216188.

The previous prime is 1393216183. The next prime is 1393216207. The reversal of 1393216189 is 9816123931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998876025 + 394340164 = 31605^2 + 19858^2 .

It is a cyclic number.

It is not a de Polignac number, because 1393216189 - 2⁷ = 1393216061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1393216183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696608094 + 696608095.

It is an arithmetic number, because the mean of its divisors is an integer number (696608095).

Almost surely, 2^1393216189 is an apocalyptic number.

It is an amenable number.

1393216189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393216189 is an equidigital number, since it uses as much as digits as its factorization.

1393216189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 1393216189 is about 37325.8112972779. The cubic root of 1393216189 is about 1116.8791170542.

The spelling of 1393216189 in words is "one billion, three hundred ninety-three million, two hundred sixteen thousand, one hundred eighty-nine".