13047878 has 4 divisors (see below), whose sum is σ = 19571820. Its totient is φ = 6523938.

The previous prime is 13047871. The next prime is 13047893. The reversal of 13047878 is 87874031.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13047871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3261968 + ... + 3261971.

It is an arithmetic number, because the mean of its divisors is an integer number (4892955).

Almost surely, 2^13047878 is an apocalyptic number.

13047878 is a deficient number, since it is larger than the sum of its proper divisors (6523942).

13047878 is an equidigital number, since it uses as much as digits as its factorization.

13047878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6523941.

The product of its (nonzero) digits is 37632, while the sum is 38.

The square root of 13047878 is about 3612.1846575168. The cubic root of 13047878 is about 235.4217746179.

The spelling of 13047878 in words is "thirteen million, forty-seven thousand, eight hundred seventy-eight".