1301289989 has 2 divisors, whose sum is σ = 1301289990. Its totient is φ = 1301289988.

The previous prime is 1301289937. The next prime is 1301290087. The reversal of 1301289989 is 9899821031.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 933302500 + 367987489 = 30550^2 + 19183^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301289989 - 2⁸ = 1301289733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1301289289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 650644994 + 650644995.

It is an arithmetic number, because the mean of its divisors is an integer number (650644995).

Almost surely, 2^1301289989 is an apocalyptic number.

It is an amenable number.

1301289989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1301289989 is an equidigital number, since it uses as much as digits as its factorization.

1301289989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 1301289989 is about 36073.3972478335. The cubic root of 1301289989 is about 1091.7537598276.

The spelling of 1301289989 in words is "one billion, three hundred one million, two hundred eighty-nine thousand, nine hundred eighty-nine".