78839575 has 6 divisors (see below), whose sum is σ = 97761104. Its totient is φ = 63071640.

The previous prime is 78839573. The next prime is 78839587. The reversal of 78839575 is 57593887.

It is not a de Polignac number, because 78839575 - 2¹ = 78839573 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 (78839573) 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 5 ways as a sum of consecutive naturals, for example, 1576767 + ... + 1576816.

Almost surely, 2^78839575 is an apocalyptic number.

78839575 is a deficient number, since it is larger than the sum of its proper divisors (18921529).

78839575 is a wasteful number, since it uses less digits than its factorization.

78839575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153593 (or 3153588 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 52.

The square root of 78839575 is about 8879.1652197715. The cubic root of 78839575 is about 428.7933994323.

The spelling of 78839575 in words is "seventy-eight million, eight hundred thirty-nine thousand, five hundred seventy-five".