77429000321 has 2 divisors, whose sum is σ = 77429000322. Its totient is φ = 77429000320.

The previous prime is 77429000303. The next prime is 77429000353. The reversal of 77429000321 is 12300092477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60669108721 + 16759891600 = 246311^2 + 129460^2 .

It is a cyclic number.

It is not a de Polignac number, because 77429000321 - 2¹⁴ = 77428983937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (77429000381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38714500160 + 38714500161.

It is an arithmetic number, because the mean of its divisors is an integer number (38714500161).

Almost surely, 2^77429000321 is an apocalyptic number.

It is an amenable number.

77429000321 is a deficient number, since it is larger than the sum of its proper divisors (1).

77429000321 is an equidigital number, since it uses as much as digits as its factorization.

77429000321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

Adding to 77429000321 its reverse (12300092477), we get a palindrome (89729092798).

The spelling of 77429000321 in words is "seventy-seven billion, four hundred twenty-nine million, three hundred twenty-one", and thus it is an aban number.