13899471 has 4 divisors (see below), whose sum is σ = 18532632. Its totient is φ = 9266312.

The previous prime is 13899463. The next prime is 13899481. The reversal of 13899471 is 17499831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17499831 = 3 ⋅5833277.

It is a cyclic number.

It is not a de Polignac number, because 13899471 - 2³ = 13899463 is a prime.

It is a super-3 number, since 3×13899471³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13899401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2316576 + ... + 2316581.

It is an arithmetic number, because the mean of its divisors is an integer number (4633158).

Almost surely, 2^13899471 is an apocalyptic number.

13899471 is a deficient number, since it is larger than the sum of its proper divisors (4633161).

13899471 is an equidigital number, since it uses as much as digits as its factorization.

13899471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4633160.

The product of its digits is 54432, while the sum is 42.

The square root of 13899471 is about 3728.1994313609. The cubic root of 13899471 is about 240.4359610675.

The spelling of 13899471 in words is "thirteen million, eight hundred ninety-nine thousand, four hundred seventy-one".