13129078 has 4 divisors (see below), whose sum is σ = 19693620. Its totient is φ = 6564538.

The previous prime is 13129073. The next prime is 13129087. The reversal of 13129078 is 87092131.

13129078 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (13129073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282268 + ... + 3282271.

It is an arithmetic number, because the mean of its divisors is an integer number (4923405).

Almost surely, 2^13129078 is an apocalyptic number.

13129078 is a deficient number, since it is larger than the sum of its proper divisors (6564542).

13129078 is an equidigital number, since it uses as much as digits as its factorization.

13129078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6564541.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 13129078 is about 3623.4069603068. The cubic root of 13129078 is about 235.9091266525.

The spelling of 13129078 in words is "thirteen million, one hundred twenty-nine thousand, seventy-eight".