6783894979 has 2 divisors, whose sum is σ = 6783894980. Its totient is φ = 6783894978.

The previous prime is 6783894967. The next prime is 6783894991. The reversal of 6783894979 is 9794983876.

It is a balanced prime because it is at equal distance from previous prime (6783894967) and next prime (6783894991).

It is a cyclic number.

It is not a de Polignac number, because 6783894979 - 2²³ = 6775506371 is a prime.

It is a super-2 number, since 2×6783894979² = 92042462172202820882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6783894479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3391947489 + 3391947490.

It is an arithmetic number, because the mean of its divisors is an integer number (3391947490).

Almost surely, 2^6783894979 is an apocalyptic number.

6783894979 is a deficient number, since it is larger than the sum of its proper divisors (1).

6783894979 is an equidigital number, since it uses as much as digits as its factorization.

6783894979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164602368, while the sum is 70.

The square root of 6783894979 is about 82364.4035916002. The cubic root of 6783894979 is about 1893.0396278447.

The spelling of 6783894979 in words is "six billion, seven hundred eighty-three million, eight hundred ninety-four thousand, nine hundred seventy-nine".