77965429 has 2 divisors, whose sum is σ = 77965430. Its totient is φ = 77965428.

The previous prime is 77965397. The next prime is 77965439. The reversal of 77965429 is 92456977.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75082225 + 2883204 = 8665^2 + 1698^2 .

It is a cyclic number.

It is not a de Polignac number, because 77965429 - 2⁵ = 77965397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77965439) 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, 38982714 + 38982715.

It is an arithmetic number, because the mean of its divisors is an integer number (38982715).

Almost surely, 2^77965429 is an apocalyptic number.

It is an amenable number.

77965429 is a deficient number, since it is larger than the sum of its proper divisors (1).

77965429 is an equidigital number, since it uses as much as digits as its factorization.

77965429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 49.

The square root of 77965429 is about 8829.8034519461. The cubic root of 77965429 is about 427.2027348744.

It can be divided in two parts, 7796 and 5429, that added together give a square (13225 = 115²).

The spelling of 77965429 in words is "seventy-seven million, nine hundred sixty-five thousand, four hundred twenty-nine".