78530527 has 4 divisors (see below), whose sum is σ = 78554056. Its totient is φ = 78507000.

The previous prime is 78530509. The next prime is 78530587. The reversal of 78530527 is 72503587.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72503587 = 13 ⋅5577199.

It is a cyclic number.

It is not a de Polignac number, because 78530527 - 2⁷ = 78530399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78530587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5724 + ... + 13777.

It is an arithmetic number, because the mean of its divisors is an integer number (19638514).

Almost surely, 2^78530527 is an apocalyptic number.

78530527 is a deficient number, since it is larger than the sum of its proper divisors (23529).

78530527 is a wasteful number, since it uses less digits than its factorization.

78530527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23528.

The product of its (nonzero) digits is 58800, while the sum is 37.

The square root of 78530527 is about 8861.7451441576. The cubic root of 78530527 is about 428.2323813762.

The spelling of 78530527 in words is "seventy-eight million, five hundred thirty thousand, five hundred twenty-seven".