771228401 has 2 divisors, whose sum is σ = 771228402. Its totient is φ = 771228400.

The previous prime is 771228397. The next prime is 771228413. The reversal of 771228401 is 104822177.

It is a happy number.

771228401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 768620176 + 2608225 = 27724^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 771228401 - 2² = 771228397 is a prime.

It is a super-3 number, since 3×771228401³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (771228461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385614200 + 385614201.

It is an arithmetic number, because the mean of its divisors is an integer number (385614201).

Almost surely, 2^771228401 is an apocalyptic number.

It is an amenable number.

771228401 is a deficient number, since it is larger than the sum of its proper divisors (1).

771228401 is an equidigital number, since it uses as much as digits as its factorization.

771228401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 771228401 is about 27770.9992798243. Note that the first 3 decimals coincide. The cubic root of 771228401 is about 917.0527934652.

The spelling of 771228401 in words is "seven hundred seventy-one million, two hundred twenty-eight thousand, four hundred one".