1398894223 has 4 divisors (see below), whose sum is σ = 1398979080. Its totient is φ = 1398809368.

The previous prime is 1398894221. The next prime is 1398894241. The reversal of 1398894223 is 3224988931.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1398894223 - 2¹ = 1398894221 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398894221) 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, 8833 + ... + 53626.

It is an arithmetic number, because the mean of its divisors is an integer number (349744770).

Almost surely, 2^1398894223 is an apocalyptic number.

1398894223 is a deficient number, since it is larger than the sum of its proper divisors (84857).

1398894223 is an equidigital number, since it uses as much as digits as its factorization.

1398894223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84856.

The product of its digits is 746496, while the sum is 49.

The square root of 1398894223 is about 37401.7943820881. The cubic root of 1398894223 is about 1118.3943358127.

The spelling of 1398894223 in words is "one billion, three hundred ninety-eight million, eight hundred ninety-four thousand, two hundred twenty-three".