1398105847 has 2 divisors, whose sum is σ = 1398105848. Its totient is φ = 1398105846.

The previous prime is 1398105811. The next prime is 1398105869. The reversal of 1398105847 is 7485018931.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1398105847 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1398105797 and 1398105806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1398105047) 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, 699052923 + 699052924.

It is an arithmetic number, because the mean of its divisors is an integer number (699052924).

Almost surely, 2^1398105847 is an apocalyptic number.

1398105847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1398105847 is an equidigital number, since it uses as much as digits as its factorization.

1398105847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 1398105847 is about 37391.2536163205. The cubic root of 1398105847 is about 1118.1841981848.

The spelling of 1398105847 in words is "one billion, three hundred ninety-eight million, one hundred five thousand, eight hundred forty-seven".