78058529 has 2 divisors, whose sum is σ = 78058530. Its totient is φ = 78058528.

The previous prime is 78058523. The next prime is 78058531. The reversal of 78058529 is 92585087.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64368529 + 13690000 = 8023^2 + 3700^2 .

It is a cyclic number.

It is not a de Polignac number, because 78058529 - 2²⁴ = 61281313 is a prime.

Together with 78058531, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78058529.

It is not a weakly prime, because it can be changed into another prime (78058523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39029264 + 39029265.

It is an arithmetic number, because the mean of its divisors is an integer number (39029265).

Almost surely, 2^78058529 is an apocalyptic number.

It is an amenable number.

78058529 is a deficient number, since it is larger than the sum of its proper divisors (1).

78058529 is an equidigital number, since it uses as much as digits as its factorization.

78058529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 78058529 is about 8835.0737970885. The cubic root of 78058529 is about 427.3727108691.

It can be divided in two parts, 78058 and 529, that added together give a palindrome (78587).

The spelling of 78058529 in words is "seventy-eight million, fifty-eight thousand, five hundred twenty-nine".