78434029 has 2 divisors, whose sum is σ = 78434030. Its totient is φ = 78434028.

The previous prime is 78434003. The next prime is 78434089. The reversal of 78434029 is 92043487.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64032004 + 14402025 = 8002^2 + 3795^2 .

It is a cyclic number.

It is not a de Polignac number, because 78434029 - 2⁹ = 78433517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78434089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39217014 + 39217015.

It is an arithmetic number, because the mean of its divisors is an integer number (39217015).

Almost surely, 2^78434029 is an apocalyptic number.

It is an amenable number.

78434029 is a deficient number, since it is larger than the sum of its proper divisors (1).

78434029 is an equidigital number, since it uses as much as digits as its factorization.

78434029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 78434029 is about 8856.2988319049. The cubic root of 78434029 is about 428.0569060650.

The spelling of 78434029 in words is "seventy-eight million, four hundred thirty-four thousand, twenty-nine".