13309887 has 8 divisors (see below), whose sum is σ = 17774640. Its totient is φ = 8859200.

The previous prime is 13309853. The next prime is 13309889. The reversal of 13309887 is 78890331.

13309887 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 13309887 - 2¹⁶ = 13244351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13309889) 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, 1062 + ... + 5267.

It is an arithmetic number, because the mean of its divisors is an integer number (2221830).

Almost surely, 2^13309887 is an apocalyptic number.

13309887 is a deficient number, since it is larger than the sum of its proper divisors (4464753).

13309887 is an equidigital number, since it uses as much as digits as its factorization.

13309887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7033.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 13309887 is about 3648.2717826390. The cubic root of 13309887 is about 236.9871452374.

It can be divided in two parts, 13309 and 887, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 13309887 in words is "thirteen million, three hundred nine thousand, eight hundred eighty-seven".