13263913 has 4 divisors (see below), whose sum is σ = 14284228. Its totient is φ = 12243600.

The previous prime is 13263911. The next prime is 13263931. The reversal of 13263913 is 31936231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31936231 = 31 ⋅1030201.

It can be written as a sum of positive squares in 2 ways, for example, as 6953769 + 6310144 = 2637^2 + 2512^2 .

It is a cyclic number.

It is not a de Polignac number, because 13263913 - 2¹ = 13263911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13263911) 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, 510138 + ... + 510163.

It is an arithmetic number, because the mean of its divisors is an integer number (3571057).

Almost surely, 2^13263913 is an apocalyptic number.

13263913 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13263913 is a deficient number, since it is larger than the sum of its proper divisors (1020315).

13263913 is a wasteful number, since it uses less digits than its factorization.

13263913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020314.

The product of its digits is 2916, while the sum is 28.

The square root of 13263913 is about 3641.9655407486. The cubic root of 13263913 is about 236.7139694733.

The spelling of 13263913 in words is "thirteen million, two hundred sixty-three thousand, nine hundred thirteen".