77434429 has 2 divisors, whose sum is σ = 77434430. Its totient is φ = 77434428.

The previous prime is 77434417. The next prime is 77434447. The reversal of 77434429 is 92443477.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46376100 + 31058329 = 6810^2 + 5573^2 .

It is a cyclic number.

It is not a de Polignac number, because 77434429 - 2⁵ = 77434397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77434391 and 77434400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77431429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38717214 + 38717215.

It is an arithmetic number, because the mean of its divisors is an integer number (38717215).

Almost surely, 2^77434429 is an apocalyptic number.

It is an amenable number.

77434429 is a deficient number, since it is larger than the sum of its proper divisors (1).

77434429 is an equidigital number, since it uses as much as digits as its factorization.

77434429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 40.

The square root of 77434429 is about 8799.6834602161. The cubic root of 77434429 is about 426.2306732665.

The spelling of 77434429 in words is "seventy-seven million, four hundred thirty-four thousand, four hundred twenty-nine".