1398463949 has 2 divisors, whose sum is σ = 1398463950. Its totient is φ = 1398463948.

The previous prime is 1398463921. The next prime is 1398463981. The reversal of 1398463949 is 9493648931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 816930724 + 581533225 = 28582^2 + 24115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1398463949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1398463894 and 1398463903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398463049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699231974 + 699231975.

It is an arithmetic number, because the mean of its divisors is an integer number (699231975).

Almost surely, 2^1398463949 is an apocalyptic number.

It is an amenable number.

1398463949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398463949 is an equidigital number, since it uses as much as digits as its factorization.

1398463949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5038848, while the sum is 56.

The square root of 1398463949 is about 37396.0418894834. The cubic root of 1398463949 is about 1118.2796582475.

The spelling of 1398463949 in words is "one billion, three hundred ninety-eight million, four hundred sixty-three thousand, nine hundred forty-nine".