1317567989 has 2 divisors, whose sum is σ = 1317567990. Its totient is φ = 1317567988.

The previous prime is 1317567973. The next prime is 1317568003. The reversal of 1317567989 is 9897657131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311526225 + 6041764 = 36215^2 + 2458^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317567989 - 2⁴ = 1317567973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317567919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 658783994 + 658783995.

It is an arithmetic number, because the mean of its divisors is an integer number (658783995).

Almost surely, 2^1317567989 is an apocalyptic number.

It is an amenable number.

1317567989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317567989 is an equidigital number, since it uses as much as digits as its factorization.

1317567989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 56.

The square root of 1317567989 is about 36298.3193688082. The cubic root of 1317567989 is about 1096.2872039006.

The spelling of 1317567989 in words is "one billion, three hundred seventeen million, five hundred sixty-seven thousand, nine hundred eighty-nine".