78969575 has 12 divisors (see below), whose sum is σ = 99265968. Its totient is φ = 62308800.

The previous prime is 78969559. The next prime is 78969593. The reversal of 78969575 is 57596987.

It is not a de Polignac number, because 78969575 - 2⁴ = 78969559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78969575.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 19811 + ... + 23460.

It is an arithmetic number, because the mean of its divisors is an integer number (8272164).

Almost surely, 2^78969575 is an apocalyptic number.

78969575 is a deficient number, since it is larger than the sum of its proper divisors (20296393).

78969575 is a wasteful number, since it uses less digits than its factorization.

78969575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43354 (or 43349 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 56.

The square root of 78969575 is about 8886.4827125247. The cubic root of 78969575 is about 429.0289517394.

It can be divided in two parts, 7896 and 9575, that added together give a palindrome (17471).

The spelling of 78969575 in words is "seventy-eight million, nine hundred sixty-nine thousand, five hundred seventy-five".