6778237 has 2 divisors, whose sum is σ = 6778238. Its totient is φ = 6778236.

The previous prime is 6778229. The next prime is 6778241. The reversal of 6778237 is 7328776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6095961 + 682276 = 2469^2 + 826^2 .

It is a cyclic number.

It is not a de Polignac number, because 6778237 - 2³ = 6778229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6778237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6778207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3389118 + 3389119.

It is an arithmetic number, because the mean of its divisors is an integer number (3389119).

Almost surely, 2^6778237 is an apocalyptic number.

It is an amenable number.

6778237 is a deficient number, since it is larger than the sum of its proper divisors (1).

6778237 is an equidigital number, since it uses as much as digits as its factorization.

6778237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 40.

The square root of 6778237 is about 2603.5047532125. The cubic root of 6778237 is about 189.2513196860.

The spelling of 6778237 in words is "six million, seven hundred seventy-eight thousand, two hundred thirty-seven".