78534229 has 4 divisors (see below), whose sum is σ = 80449740. Its totient is φ = 76618720.

The previous prime is 78534221. The next prime is 78534241. The reversal of 78534229 is 92243587.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1270129 + 77264100 = 1127^2 + 8790^2 .

It is a cyclic number.

It is not a de Polignac number, because 78534229 - 2³ = 78534221 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78534191 and 78534200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78534221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 957694 + ... + 957775.

It is an arithmetic number, because the mean of its divisors is an integer number (20112435).

Almost surely, 2^78534229 is an apocalyptic number.

It is an amenable number.

78534229 is a deficient number, since it is larger than the sum of its proper divisors (1915511).

78534229 is a wasteful number, since it uses less digits than its factorization.

78534229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915510.

The product of its digits is 120960, while the sum is 40.

The square root of 78534229 is about 8861.9540170326. The cubic root of 78534229 is about 428.2391103576.

The spelling of 78534229 in words is "seventy-eight million, five hundred thirty-four thousand, two hundred twenty-nine".