13247479 has 4 divisors (see below), whose sum is σ = 15139984. Its totient is φ = 11354976.

The previous prime is 13247477. The next prime is 13247491. The reversal of 13247479 is 97474231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97474231 = 109 ⋅894259.

It is a cyclic number.

It is not a de Polignac number, because 13247479 - 2¹ = 13247477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13247473) 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, 946242 + ... + 946255.

It is an arithmetic number, because the mean of its divisors is an integer number (3784996).

Almost surely, 2^13247479 is an apocalyptic number.

13247479 is a deficient number, since it is larger than the sum of its proper divisors (1892505).

13247479 is an equidigital number, since it uses as much as digits as its factorization.

13247479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892504.

The product of its digits is 42336, while the sum is 37.

The square root of 13247479 is about 3639.7086421855. The cubic root of 13247479 is about 236.6161661298.

The spelling of 13247479 in words is "thirteen million, two hundred forty-seven thousand, four hundred seventy-nine".