13906005 has 32 divisors (see below), whose sum is σ = 23846400. Its totient is φ = 6898752.

The previous prime is 13906003. The next prime is 13906027. The reversal of 13906005 is 50060931.

It is not a de Polignac number, because 13906005 - 2¹ = 13906003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13906001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16402 + ... + 17228.

It is an arithmetic number, because the mean of its divisors is an integer number (745200).

Almost surely, 2^13906005 is an apocalyptic number.

13906005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13906005 is a deficient number, since it is larger than the sum of its proper divisors (9940395).

13906005 is a wasteful number, since it uses less digits than its factorization.

13906005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 13906005 is about 3729.0756227248. The cubic root of 13906005 is about 240.4736306657.

Adding to 13906005 its reverse (50060931), we get a palindrome (63966936).

The spelling of 13906005 in words is "thirteen million, nine hundred six thousand, five".