13439487 has 4 divisors (see below), whose sum is σ = 17919320. Its totient is φ = 8959656.

The previous prime is 13439483. The next prime is 13439497. The reversal of 13439487 is 78493431.

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

It is not a de Polignac number, because 13439487 - 2² = 13439483 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 (13439483) 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, 2239912 + ... + 2239917.

It is an arithmetic number, because the mean of its divisors is an integer number (4479830).

Almost surely, 2^13439487 is an apocalyptic number.

13439487 is a deficient number, since it is larger than the sum of its proper divisors (4479833).

13439487 is an equidigital number, since it uses as much as digits as its factorization.

13439487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4479832.

The product of its digits is 72576, while the sum is 39.

The square root of 13439487 is about 3665.9905891860. The cubic root of 13439487 is about 237.7538530403.

It can be divided in two parts, 134 and 39487, that added together give a triangular number (39621 = T₂₈₁).

The spelling of 13439487 in words is "thirteen million, four hundred thirty-nine thousand, four hundred eighty-seven".