1298504989 has 2 divisors, whose sum is σ = 1298504990. Its totient is φ = 1298504988.

The previous prime is 1298504939. The next prime is 1298505001. The reversal of 1298504989 is 9894058921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1111088889 + 187416100 = 33333^2 + 13690^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298504989 - 2⁹ = 1298504477 is a prime.

It is a super-2 number, since 2×1298504989² = 3372230412915780242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1298504939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649252494 + 649252495.

It is an arithmetic number, because the mean of its divisors is an integer number (649252495).

Almost surely, 2^1298504989 is an apocalyptic number.

It is an amenable number.

1298504989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298504989 is an equidigital number, since it uses as much as digits as its factorization.

1298504989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The square root of 1298504989 is about 36034.7747183190. The cubic root of 1298504989 is about 1090.9743522320.

The spelling of 1298504989 in words is "one billion, two hundred ninety-eight million, five hundred four thousand, nine hundred eighty-nine".