776674321 has 2 divisors, whose sum is σ = 776674322. Its totient is φ = 776674320.

The previous prime is 776674309. The next prime is 776674369. The reversal of 776674321 is 123476677.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663783696 + 112890625 = 25764^2 + 10625^2 .

It is a cyclic number.

It is not a de Polignac number, because 776674321 - 2⁹ = 776673809 is a prime.

It is a super-2 number, since 2×776674321² = 1206446001801622082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (776674391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 388337160 + 388337161.

It is an arithmetic number, because the mean of its divisors is an integer number (388337161).

Almost surely, 2^776674321 is an apocalyptic number.

It is an amenable number.

776674321 is a deficient number, since it is larger than the sum of its proper divisors (1).

776674321 is an equidigital number, since it uses as much as digits as its factorization.

776674321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 43.

The square root of 776674321 is about 27868.8772827324. The cubic root of 776674321 is about 919.2062786380.

The spelling of 776674321 in words is "seven hundred seventy-six million, six hundred seventy-four thousand, three hundred twenty-one".