78534129 has 8 divisors (see below), whose sum is σ = 108090112. Its totient is φ = 50667120.

The previous prime is 78534103. The next prime is 78534139. The reversal of 78534129 is 92143587.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78534129 - 2⁵ = 78534097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78534139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422134 + ... + 422319.

It is an arithmetic number, because the mean of its divisors is an integer number (13511264).

Almost surely, 2^78534129 is an apocalyptic number.

It is an amenable number.

78534129 is a deficient number, since it is larger than the sum of its proper divisors (29555983).

78534129 is a wasteful number, since it uses less digits than its factorization.

78534129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844487.

The product of its digits is 60480, while the sum is 39.

The square root of 78534129 is about 8861.9483749343. The cubic root of 78534129 is about 428.2389285942.

The spelling of 78534129 in words is "seventy-eight million, five hundred thirty-four thousand, one hundred twenty-nine".