4168978389 has 20 divisors (see below), whose sum is σ = 6313053516. Its totient is φ = 2741242176.

The previous prime is 4168978379. The next prime is 4168978403. The reversal of 4168978389 is 9838798614.

4168978389 is a `hidden beast` number, since 4 + 168 + 97 + 8 + 389 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3469799025 + 699179364 = 58905^2 + 26442^2 .

It is not a de Polignac number, because 4168978389 - 2⁸ = 4168978133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4168978369) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 346614 + ... + 358439.

Almost surely, 2^4168978389 is an apocalyptic number.

It is an amenable number.

4168978389 is a deficient number, since it is larger than the sum of its proper divisors (2144075127).

4168978389 is an equidigital number, since it uses as much as digits as its factorization.

4168978389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705138 (or 705129 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The square root of 4168978389 is about 64567.6264779804. The cubic root of 4168978389 is about 1609.4465117733.

The spelling of 4168978389 in words is "four billion, one hundred sixty-eight million, nine hundred seventy-eight thousand, three hundred eighty-nine".