1398480217 has 2 divisors, whose sum is σ = 1398480218. Its totient is φ = 1398480216.

The previous prime is 1398480173. The next prime is 1398480221. The reversal of 1398480217 is 7120848931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1201246281 + 197233936 = 34659^2 + 14044^2 .

It is a cyclic number.

It is not a de Polignac number, because 1398480217 - 2⁷ = 1398480089 is a prime.

It is not a weakly prime, because it can be changed into another prime (1398480227) 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, 699240108 + 699240109.

It is an arithmetic number, because the mean of its divisors is an integer number (699240109).

Almost surely, 2^1398480217 is an apocalyptic number.

It is an amenable number.

1398480217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398480217 is an equidigital number, since it uses as much as digits as its factorization.

1398480217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 1398480217 is about 37396.2593985013. The cubic root of 1398480217 is about 1118.2839944582.

The spelling of 1398480217 in words is "one billion, three hundred ninety-eight million, four hundred eighty thousand, two hundred seventeen".