1315543189 has 2 divisors, whose sum is σ = 1315543190. Its totient is φ = 1315543188.

The previous prime is 1315543139. The next prime is 1315543219. The reversal of 1315543189 is 9813455131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976062564 + 339480625 = 31242^2 + 18425^2 .

It is an emirp because it is prime and its reverse (9813455131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1315543189 - 2²³ = 1307154581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1315543139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 657771594 + 657771595.

It is an arithmetic number, because the mean of its divisors is an integer number (657771595).

Almost surely, 2^1315543189 is an apocalyptic number.

It is an amenable number.

1315543189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315543189 is an equidigital number, since it uses as much as digits as its factorization.

1315543189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The square root of 1315543189 is about 36270.4175465351. The cubic root of 1315543189 is about 1095.7253352635.

The spelling of 1315543189 in words is "one billion, three hundred fifteen million, five hundred forty-three thousand, one hundred eighty-nine".