78874847 has 4 divisors (see below), whose sum is σ = 79057440. Its totient is φ = 78692256.

The previous prime is 78874841. The next prime is 78874853. The reversal of 78874847 is 74847887.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (78874841) and next prime (78874853).

It is a cyclic number.

It is not a de Polignac number, because 78874847 - 2⁸ = 78874591 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 (78874841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90647 + ... + 91512.

It is an arithmetic number, because the mean of its divisors is an integer number (19764360).

Almost surely, 2^78874847 is an apocalyptic number.

78874847 is a deficient number, since it is larger than the sum of its proper divisors (182593).

78874847 is a wasteful number, since it uses less digits than its factorization.

78874847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182592.

The product of its digits is 2809856, while the sum is 53.

The square root of 78874847 is about 8881.1512204218. The cubic root of 78874847 is about 428.8573357902.

The spelling of 78874847 in words is "seventy-eight million, eight hundred seventy-four thousand, eight hundred forty-seven".