6798778969 has 2 divisors, whose sum is σ = 6798778970. Its totient is φ = 6798778968.

The previous prime is 6798778963. The next prime is 6798778979. The reversal of 6798778969 is 9698778976.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6693203344 + 105575625 = 81812^2 + 10275^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6798778969 is a prime.

It is a super-2 number, since 2×6798778969² = 92446790938633405922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6798778895 and 6798778904.

It is not a weakly prime, because it can be changed into another prime (6798778963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3399389484 + 3399389485.

It is an arithmetic number, because the mean of its divisors is an integer number (3399389485).

Almost surely, 2^6798778969 is an apocalyptic number.

It is an amenable number.

6798778969 is a deficient number, since it is larger than the sum of its proper divisors (1).

6798778969 is an equidigital number, since it uses as much as digits as its factorization.

6798778969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576108288, while the sum is 76.

The square root of 6798778969 is about 82454.7085920507. The cubic root of 6798778969 is about 1894.4230711247.

The spelling of 6798778969 in words is "six billion, seven hundred ninety-eight million, seven hundred seventy-eight thousand, nine hundred sixty-nine".