13897306 has 8 divisors (see below), whose sum is σ = 20892564. Its totient is φ = 6933120.

The previous prime is 13897291. The next prime is 13897307. The reversal of 13897306 is 60379831.

It can be written as a sum of positive squares in 2 ways, for example, as 13756681 + 140625 = 3709^2 + 375^2 .

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

It is a super-3 number, since 3×13897306³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (13897307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6615 + ... + 8458.

Almost surely, 2^13897306 is an apocalyptic number.

13897306 is a deficient number, since it is larger than the sum of its proper divisors (6995258).

13897306 is a wasteful number, since it uses less digits than its factorization.

13897306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15536.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 13897306 is about 3727.9090654146. The cubic root of 13897306 is about 240.4234768781.

The spelling of 13897306 in words is "thirteen million, eight hundred ninety-seven thousand, three hundred six".