776401 has 2 divisors, whose sum is σ = 776402. Its totient is φ = 776400.

The previous prime is 776389. The next prime is 776429. The reversal of 776401 is 104677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 767376 + 9025 = 876^2 + 95^2 .

It is an emirp because it is prime and its reverse (104677) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 776401 - 2⁹ = 775889 is a prime.

776401 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (776471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388200 + 388201.

It is an arithmetic number, because the mean of its divisors is an integer number (388201).

2⁷⁷⁶⁴⁰¹ is an apocalyptic number.

It is an amenable number.

776401 is a deficient number, since it is larger than the sum of its proper divisors (1).

776401 is an equidigital number, since it uses as much as digits as its factorization.

776401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 776401 is about 881.1361983258. The cubic root of 776401 is about 91.9098439419.

The spelling of 776401 in words is "seven hundred seventy-six thousand, four hundred one".