13504729247 has 4 divisors (see below), whose sum is σ = 13505539320. Its totient is φ = 13503919176.

The previous prime is 13504729219. The next prime is 13504729279. The reversal of 13504729247 is 74292740531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74292740531 = 29 ⋅2561818639.

It is a cyclic number.

It is not a de Polignac number, because 13504729247 - 2¹² = 13504725151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13504729198 and 13504729207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13504729207) 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, 379493 + ... + 413550.

It is an arithmetic number, because the mean of its divisors is an integer number (3376384830).

Almost surely, 2^13504729247 is an apocalyptic number.

13504729247 is a deficient number, since it is larger than the sum of its proper divisors (810073).

13504729247 is an equidigital number, since it uses as much as digits as its factorization.

13504729247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810072.

The product of its (nonzero) digits is 423360, while the sum is 44.

The spelling of 13504729247 in words is "thirteen billion, five hundred four million, seven hundred twenty-nine thousand, two hundred forty-seven".