13981715 has 8 divisors (see below), whose sum is σ = 18303408. Its totient is φ = 10168480.

The previous prime is 13981691. The next prime is 13981727. The reversal of 13981715 is 51718931.

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

It is not a de Polignac number, because 13981715 - 2⁸ = 13981459 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 127052 + ... + 127161.

It is an arithmetic number, because the mean of its divisors is an integer number (2287926).

Almost surely, 2^13981715 is an apocalyptic number.

13981715 is a deficient number, since it is larger than the sum of its proper divisors (4321693).

13981715 is a wasteful number, since it uses less digits than its factorization.

13981715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254229.

The product of its digits is 7560, while the sum is 35.

The square root of 13981715 is about 3739.2131525229. The cubic root of 13981715 is about 240.9092534385.

It can be divided in two parts, 1398 and 1715, that added together give a palindrome (3113).

The spelling of 13981715 in words is "thirteen million, nine hundred eighty-one thousand, seven hundred fifteen".