1398642803 has 2 divisors, whose sum is σ = 1398642804. Its totient is φ = 1398642802.

The previous prime is 1398642797. The next prime is 1398642863. The reversal of 1398642803 is 3082468931.

It is a weak prime.

It is an emirp because it is prime and its reverse (3082468931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1398642803 - 2⁴ = 1398642787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1398642863) 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, 699321401 + 699321402.

It is an arithmetic number, because the mean of its divisors is an integer number (699321402).

Almost surely, 2^1398642803 is an apocalyptic number.

1398642803 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398642803 is an equidigital number, since it uses as much as digits as its factorization.

1398642803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 1398642803 is about 37398.4331623666. The cubic root of 1398642803 is about 1118.3273296621.

The spelling of 1398642803 in words is "one billion, three hundred ninety-eight million, six hundred forty-two thousand, eight hundred three".