1313989489 has 2 divisors, whose sum is σ = 1313989490. Its totient is φ = 1313989488.

The previous prime is 1313989487. The next prime is 1313989493. The reversal of 1313989489 is 9849893131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 690638400 + 623351089 = 26280^2 + 24967^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313989489 - 2¹ = 1313989487 is a prime.

It is a super-2 number, since 2×1313989489² = 3453136754404962242, which contains 22 as substring.

Together with 1313989487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1313989487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656994744 + 656994745.

It is an arithmetic number, because the mean of its divisors is an integer number (656994745).

Almost surely, 2^1313989489 is an apocalyptic number.

It is an amenable number.

1313989489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313989489 is an equidigital number, since it uses as much as digits as its factorization.

1313989489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 55.

The square root of 1313989489 is about 36248.9929377355. The cubic root of 1313989489 is about 1095.2938027184.

The spelling of 1313989489 in words is "one billion, three hundred thirteen million, nine hundred eighty-nine thousand, four hundred eighty-nine".