78872833 has 4 divisors (see below), whose sum is σ = 84939988. Its totient is φ = 72805680.

The previous prime is 78872831. The next prime is 78872839. The reversal of 78872833 is 33827887.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33269824 + 45603009 = 5768^2 + 6753^2 .

It is a cyclic number.

It is not a de Polignac number, because 78872833 - 2¹ = 78872831 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78872831) 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, 3033558 + ... + 3033583.

It is an arithmetic number, because the mean of its divisors is an integer number (21234997).

Almost surely, 2^78872833 is an apocalyptic number.

It is an amenable number.

78872833 is a deficient number, since it is larger than the sum of its proper divisors (6067155).

78872833 is a wasteful number, since it uses less digits than its factorization.

78872833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6067154.

The product of its digits is 451584, while the sum is 46.

The square root of 78872833 is about 8881.0378334967. The cubic root of 78872833 is about 428.8536855939.

The spelling of 78872833 in words is "seventy-eight million, eight hundred seventy-two thousand, eight hundred thirty-three".