776449 has 2 divisors, whose sum is σ = 776450. Its totient is φ = 776448.

The previous prime is 776429. The next prime is 776453. The reversal of 776449 is 944677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 748225 + 28224 = 865^2 + 168^2 .

It is an emirp because it is prime and its reverse (944677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 776449 - 2⁹ = 775937 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (776429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388224 + 388225.

It is an arithmetic number, because the mean of its divisors is an integer number (388225).

2⁷⁷⁶⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

776449 is a deficient number, since it is larger than the sum of its proper divisors (1).

776449 is an equidigital number, since it uses as much as digits as its factorization.

776449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 776449 is about 881.1634354647. The cubic root of 776449 is about 91.9117379724.

It can be divided in two parts, 776 and 449, that added together give a triangular number (1225 = T₄₉).

The spelling of 776449 in words is "seven hundred seventy-six thousand, four hundred forty-nine".