13487309 has 8 divisors (see below), whose sum is σ = 14820960. Its totient is φ = 12171600.

The previous prime is 13487297. The next prime is 13487323. The reversal of 13487309 is 90378431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13487309 - 2⁴ = 13487293 is a prime.

It is a super-2 number, since 2×13487309² = 363815008122962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13487339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2882 + ... + 5939.

It is an arithmetic number, because the mean of its divisors is an integer number (1852620).

Almost surely, 2^13487309 is an apocalyptic number.

It is an amenable number.

13487309 is a deficient number, since it is larger than the sum of its proper divisors (1333651).

13487309 is a wasteful number, since it uses less digits than its factorization.

13487309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8971.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13487309 is about 3672.5071817493. The cubic root of 13487309 is about 238.0355206735.

The spelling of 13487309 in words is "thirteen million, four hundred eighty-seven thousand, three hundred nine".