78846249 has 4 divisors (see below), whose sum is σ = 105128336. Its totient is φ = 52564164.

The previous prime is 78846247. The next prime is 78846293. The reversal of 78846249 is 94264887.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 78846249 - 2¹ = 78846247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78846198 and 78846207.

It is not an unprimeable number, because it can be changed into a prime (78846247) 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, 13141039 + ... + 13141044.

It is an arithmetic number, because the mean of its divisors is an integer number (26282084).

Almost surely, 2^78846249 is an apocalyptic number.

It is an amenable number.

78846249 is a deficient number, since it is larger than the sum of its proper divisors (26282087).

78846249 is a wasteful number, since it uses less digits than its factorization.

78846249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26282086.

The product of its digits is 774144, while the sum is 48.

The square root of 78846249 is about 8879.5410354365. The cubic root of 78846249 is about 428.8054986283.

The spelling of 78846249 in words is "seventy-eight million, eight hundred forty-six thousand, two hundred forty-nine".