778049 has 2 divisors, whose sum is σ = 778050. Its totient is φ = 778048.

The previous prime is 778027. The next prime is 778051. The reversal of 778049 is 940877.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409600 + 368449 = 640^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 778049 - 2¹² = 773953 is a prime.

Together with 778051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (778079) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389024 + 389025.

It is an arithmetic number, because the mean of its divisors is an integer number (389025).

2⁷⁷⁸⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

778049 is a deficient number, since it is larger than the sum of its proper divisors (1).

778049 is an equidigital number, since it uses as much as digits as its factorization.

778049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 778049 is about 882.0708588316. The cubic root of 778049 is about 91.9748277068.

The spelling of 778049 in words is "seven hundred seventy-eight thousand, forty-nine".