13009915 has 8 divisors (see below), whose sum is σ = 15992928. Its totient is φ = 10153920.

The previous prime is 13009907. The next prime is 13009921. The reversal of 13009915 is 51990031.

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

It is not a de Polignac number, because 13009915 - 2³ = 13009907 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31527 + ... + 31936.

It is an arithmetic number, because the mean of its divisors is an integer number (1999116).

Almost surely, 2^13009915 is an apocalyptic number.

13009915 is a deficient number, since it is larger than the sum of its proper divisors (2983013).

13009915 is an equidigital number, since it uses as much as digits as its factorization.

13009915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63509.

The product of its (nonzero) digits is 1215, while the sum is 28.

The square root of 13009915 is about 3606.9259765069. The cubic root of 13009915 is about 235.1932317437.

Adding to 13009915 its reverse (51990031), we get a palindrome (64999946).

It can be divided in two parts, 13009 and 915, that added together give a square (13924 = 118²).

The spelling of 13009915 in words is "thirteen million, nine thousand, nine hundred fifteen".