775689401 has 2 divisors, whose sum is σ = 775689402. Its totient is φ = 775689400.

The previous prime is 775689377. The next prime is 775689403. The reversal of 775689401 is 104986577.

775689401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 540097600 + 235591801 = 23240^2 + 15349^2 .

It is a cyclic number.

It is not a de Polignac number, because 775689401 - 2⁶ = 775689337 is a prime.

Together with 775689403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (775689403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 387844700 + 387844701.

It is an arithmetic number, because the mean of its divisors is an integer number (387844701).

Almost surely, 2^775689401 is an apocalyptic number.

It is an amenable number.

775689401 is a deficient number, since it is larger than the sum of its proper divisors (1).

775689401 is an equidigital number, since it uses as much as digits as its factorization.

775689401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 775689401 is about 27851.2010692537. The cubic root of 775689401 is about 918.8175581710.

The spelling of 775689401 in words is "seven hundred seventy-five million, six hundred eighty-nine thousand, four hundred one".