1398489317 has 2 divisors, whose sum is σ = 1398489318. Its totient is φ = 1398489316.

The previous prime is 1398489283. The next prime is 1398489341. The reversal of 1398489317 is 7139848931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1321031716 + 77457601 = 36346^2 + 8801^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1398489317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1395489317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699244658 + 699244659.

It is an arithmetic number, because the mean of its divisors is an integer number (699244659).

Almost surely, 2^1398489317 is an apocalyptic number.

It is an amenable number.

1398489317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398489317 is an equidigital number, since it uses as much as digits as its factorization.

1398489317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306368, while the sum is 53.

The square root of 1398489317 is about 37396.3810682264. The cubic root of 1398489317 is about 1118.2864200347.

It can be divided in two parts, 13984 and 89317, that added together give a palindrome (103301).

The spelling of 1398489317 in words is "one billion, three hundred ninety-eight million, four hundred eighty-nine thousand, three hundred seventeen".