6943421489 has 4 divisors (see below), whose sum is σ = 6943846260. Its totient is φ = 6942996720.

The previous prime is 6943421473. The next prime is 6943421491. The reversal of 6943421489 is 9841243496.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5864955889 + 1078465600 = 76583^2 + 32840^2 .

It is a cyclic number.

It is not a de Polignac number, because 6943421489 - 2⁴ = 6943421473 is a prime.

It is a super-2 number, since 2×6943421489² = 96422203947813954242, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6943421449) 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, 186842 + ... + 220899.

It is an arithmetic number, because the mean of its divisors is an integer number (1735961565).

Almost surely, 2^6943421489 is an apocalyptic number.

It is an amenable number.

6943421489 is a deficient number, since it is larger than the sum of its proper divisors (424771).

6943421489 is a wasteful number, since it uses less digits than its factorization.

6943421489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424770.

The product of its digits is 1492992, while the sum is 50.

The square root of 6943421489 is about 83327.1953746194. The cubic root of 6943421489 is about 1907.7633869887.

The spelling of 6943421489 in words is "six billion, nine hundred forty-three million, four hundred twenty-one thousand, four hundred eighty-nine".