1398699647 has 2 divisors, whose sum is σ = 1398699648. Its totient is φ = 1398699646.

The previous prime is 1398699623. The next prime is 1398699671. The reversal of 1398699647 is 7469968931.

It is a balanced prime because it is at equal distance from previous prime (1398699623) and next prime (1398699671).

It is a cyclic number.

It is not a de Polignac number, because 1398699647 - 2⁶ = 1398699583 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1398699647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398699697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699349823 + 699349824.

It is an arithmetic number, because the mean of its divisors is an integer number (699349824).

Almost surely, 2^1398699647 is an apocalyptic number.

1398699647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398699647 is an equidigital number, since it uses as much as digits as its factorization.

1398699647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17635968, while the sum is 62.

The square root of 1398699647 is about 37399.1931330076. The cubic root of 1398699647 is about 1118.3424799057.

The spelling of 1398699647 in words is "one billion, three hundred ninety-eight million, six hundred ninety-nine thousand, six hundred forty-seven".