1306989539 has 2 divisors, whose sum is σ = 1306989540. Its totient is φ = 1306989538.

The previous prime is 1306989521. The next prime is 1306989553. The reversal of 1306989539 is 9359896031.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1306989539 is a prime.

It is not a weakly prime, because it can be changed into another prime (1306989589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653494769 + 653494770.

It is an arithmetic number, because the mean of its divisors is an integer number (653494770).

Almost surely, 2^1306989539 is an apocalyptic number.

1306989539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306989539 is an equidigital number, since it uses as much as digits as its factorization.

1306989539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The square root of 1306989539 is about 36152.3102857895. The cubic root of 1306989539 is about 1093.3453708541.

The spelling of 1306989539 in words is "one billion, three hundred six million, nine hundred eighty-nine thousand, five hundred thirty-nine".