1398561017 has 4 divisors (see below), whose sum is σ = 1598355456. Its totient is φ = 1198766580.

The previous prime is 1398561013. The next prime is 1398561029. The reversal of 1398561017 is 7101658931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1398561017 - 2² = 1398561013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398561011) 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 in 3 ways as a sum of consecutive naturals, for example, 99897209 + ... + 99897222.

It is an arithmetic number, because the mean of its divisors is an integer number (399588864).

Almost surely, 2^1398561017 is an apocalyptic number.

It is an amenable number.

1398561017 is a deficient number, since it is larger than the sum of its proper divisors (199794439).

1398561017 is an equidigital number, since it uses as much as digits as its factorization.

1398561017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199794438.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 1398561017 is about 37397.3397048507. The cubic root of 1398561017 is about 1118.3055310771.

The spelling of 1398561017 in words is "one billion, three hundred ninety-eight million, five hundred sixty-one thousand, seventeen".