78875449 has 4 divisors (see below), whose sum is σ = 79761780. Its totient is φ = 77989120.

The previous prime is 78875437. The next prime is 78875483. The reversal of 78875449 is 94457887.

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 6285049 + 72590400 = 2507^2 + 8520^2 .

It is a cyclic number.

It is not a de Polignac number, because 78875449 - 2¹¹ = 78873401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78875396 and 78875405.

It is not an unprimeable number, because it can be changed into a prime (78873449) 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, 443032 + ... + 443209.

It is an arithmetic number, because the mean of its divisors is an integer number (19940445).

Almost surely, 2^78875449 is an apocalyptic number.

It is an amenable number.

78875449 is a deficient number, since it is larger than the sum of its proper divisors (886331).

78875449 is an equidigital number, since it uses as much as digits as its factorization.

78875449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886330.

The product of its digits is 2257920, while the sum is 52.

The square root of 78875449 is about 8881.1851123597. The cubic root of 78875449 is about 428.8584268497.

The spelling of 78875449 in words is "seventy-eight million, eight hundred seventy-five thousand, four hundred forty-nine".