1398643943 has 8 divisors (see below), whose sum is σ = 1406029200. Its totient is φ = 1391277888.

The previous prime is 1398643927. The next prime is 1398643949. The reversal of 1398643943 is 3493468931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1398643943 - 2⁴ = 1398643927 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1398643891 and 1398643900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1398643949) 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 in 7 ways as a sum of consecutive naturals, for example, 154928 + ... + 163706.

It is an arithmetic number, because the mean of its divisors is an integer number (175753650).

Almost surely, 2^1398643943 is an apocalyptic number.

1398643943 is a deficient number, since it is larger than the sum of its proper divisors (7385257).

1398643943 is an equidigital number, since it uses as much as digits as its factorization.

1398643943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9601.

The product of its digits is 1679616, while the sum is 50.

The square root of 1398643943 is about 37398.4484036437. The cubic root of 1398643943 is about 1118.3276335025.

The spelling of 1398643943 in words is "one billion, three hundred ninety-eight million, six hundred forty-three thousand, nine hundred forty-three".