1310039989 has 2 divisors, whose sum is σ = 1310039990. Its totient is φ = 1310039988.

The previous prime is 1310039981. The next prime is 1310040013. The reversal of 1310039989 is 9899300131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1308051889 + 1988100 = 36167^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1310039989 - 2³ = 1310039981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1310039981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655019994 + 655019995.

It is an arithmetic number, because the mean of its divisors is an integer number (655019995).

Almost surely, 2^1310039989 is an apocalyptic number.

It is an amenable number.

1310039989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310039989 is an equidigital number, since it uses as much as digits as its factorization.

1310039989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 1310039989 is about 36194.4745644967. The cubic root of 1310039989 is about 1094.1953149223.

The spelling of 1310039989 in words is "one billion, three hundred ten million, thirty-nine thousand, nine hundred eighty-nine".