774138929 has 2 divisors, whose sum is σ = 774138930. Its totient is φ = 774138928.

The previous prime is 774138923. The next prime is 774138977. The reversal of 774138929 is 929831477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 774119329 + 19600 = 27823^2 + 140^2 .

It is an emirp because it is prime and its reverse (929831477) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-774138929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (774138923) 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, 387069464 + 387069465.

It is an arithmetic number, because the mean of its divisors is an integer number (387069465).

Almost surely, 2^774138929 is an apocalyptic number.

It is an amenable number.

774138929 is a deficient number, since it is larger than the sum of its proper divisors (1).

774138929 is an equidigital number, since it uses as much as digits as its factorization.

774138929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 50.

The square root of 774138929 is about 27823.3522243456. The cubic root of 774138929 is about 918.2049628334.

The spelling of 774138929 in words is "seven hundred seventy-four million, one hundred thirty-eight thousand, nine hundred twenty-nine".