6786942389 has 2 divisors, whose sum is σ = 6786942390. Its totient is φ = 6786942388.

The previous prime is 6786942353. The next prime is 6786942391. The reversal of 6786942389 is 9832496876.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5873996164 + 912946225 = 76642^2 + 30215^2 .

It is a cyclic number.

It is not a de Polignac number, because 6786942389 - 2⁸ = 6786942133 is a prime.

Together with 6786942391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6786942089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3393471194 + 3393471195.

It is an arithmetic number, because the mean of its divisors is an integer number (3393471195).

Almost surely, 2^6786942389 is an apocalyptic number.

It is an amenable number.

6786942389 is a deficient number, since it is larger than the sum of its proper divisors (1).

6786942389 is an equidigital number, since it uses as much as digits as its factorization.

6786942389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31352832, while the sum is 62.

The square root of 6786942389 is about 82382.9010717637. The cubic root of 6786942389 is about 1893.3230443928.

The spelling of 6786942389 in words is "six billion, seven hundred eighty-six million, nine hundred forty-two thousand, three hundred eighty-nine".