771449321 has 2 divisors, whose sum is σ = 771449322. Its totient is φ = 771449320.

The previous prime is 771449309. The next prime is 771449333. The reversal of 771449321 is 123944177.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (771449309) and next prime (771449333).

It can be written as a sum of positive squares in only one way, i.e., 728730025 + 42719296 = 26995^2 + 6536^2 .

It is a cyclic number.

It is not a de Polignac number, because 771449321 - 2⁶ = 771449257 is a prime.

It is a super-2 number, since 2×771449321² = 1190268109742722082, which contains 22 as substring.

It is a Chen prime.

It is equal to p_39751913 and since 771449321 and 39751913 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (771439321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385724660 + 385724661.

It is an arithmetic number, because the mean of its divisors is an integer number (385724661).

Almost surely, 2^771449321 is an apocalyptic number.

It is an amenable number.

771449321 is a deficient number, since it is larger than the sum of its proper divisors (1).

771449321 is an equidigital number, since it uses as much as digits as its factorization.

771449321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 38.

The square root of 771449321 is about 27774.9765256426. The cubic root of 771449321 is about 917.1403490070.

The spelling of 771449321 in words is "seven hundred seventy-one million, four hundred forty-nine thousand, three hundred twenty-one".