78526729 has 8 divisors (see below), whose sum is σ = 80606240. Its totient is φ = 76458816.

The previous prime is 78526727. The next prime is 78526739. The reversal of 78526729 is 92762587.

78526729 is nontrivially palindromic in base 9.

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

It is not a de Polignac number, because 78526729 - 2¹ = 78526727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78526727) 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, 11782 + ... + 17200.

It is an arithmetic number, because the mean of its divisors is an integer number (10075780).

It is a Poulet number, since it divides 2^78526728-1.

Almost surely, 2^78526729 is an apocalyptic number.

It is an amenable number.

78526729 is a deficient number, since it is larger than the sum of its proper divisors (2079511).

78526729 is a wasteful number, since it uses less digits than its factorization.

78526729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5799.

The product of its digits is 423360, while the sum is 46.

The square root of 78526729 is about 8861.5308496896. The cubic root of 78526729 is about 428.2254776795.

The spelling of 78526729 in words is "seventy-eight million, five hundred twenty-six thousand, seven hundred twenty-nine".