78975647 has 8 divisors (see below), whose sum is σ = 84374400. Its totient is φ = 73701144.

The previous prime is 78975599. The next prime is 78975653. The reversal of 78975647 is 74657987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78975647 - 2²⁰ = 77927071 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 (78974647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29747 + ... + 32292.

It is an arithmetic number, because the mean of its divisors is an integer number (10546800).

Almost surely, 2^78975647 is an apocalyptic number.

78975647 is a deficient number, since it is larger than the sum of its proper divisors (5398753).

78975647 is a wasteful number, since it uses less digits than its factorization.

78975647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62125.

The product of its digits is 2963520, while the sum is 53.

The square root of 78975647 is about 8886.8243484385. The cubic root of 78975647 is about 429.0399475228.

The spelling of 78975647 in words is "seventy-eight million, nine hundred seventy-five thousand, six hundred forty-seven".