78749243 has 8 divisors (see below), whose sum is σ = 83166720. Its totient is φ = 74359080.

The previous prime is 78749227. The next prime is 78749273. The reversal of 78749243 is 34294787.

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 78749243 - 2⁴ = 78749227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78749194 and 78749203.

It is not an unprimeable number, because it can be changed into a prime (78749273) 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, 755 + ... + 12572.

It is an arithmetic number, because the mean of its divisors is an integer number (10395840).

Almost surely, 2^78749243 is an apocalyptic number.

78749243 is a deficient number, since it is larger than the sum of its proper divisors (4417477).

78749243 is a wasteful number, since it uses less digits than its factorization.

78749243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13657.

The product of its digits is 338688, while the sum is 44.

The square root of 78749243 is about 8874.0770224289. The cubic root of 78749243 is about 428.6295706779.

The spelling of 78749243 in words is "seventy-eight million, seven hundred forty-nine thousand, two hundred forty-three".