13981655 has 8 divisors (see below), whose sum is σ = 16800432. Its totient is φ = 11170368.

The previous prime is 13981637. The next prime is 13981661. The reversal of 13981655 is 55618931.

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

It is a cyclic number.

It is not a de Polignac number, because 13981655 - 2⁸ = 13981399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3812 + ... + 6518.

It is an arithmetic number, because the mean of its divisors is an integer number (2100054).

Almost surely, 2^13981655 is an apocalyptic number.

13981655 is a deficient number, since it is larger than the sum of its proper divisors (2818777).

13981655 is a wasteful number, since it uses less digits than its factorization.

13981655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3745.

The product of its digits is 32400, while the sum is 38.

The square root of 13981655 is about 3739.2051294359. The cubic root of 13981655 is about 240.9089088319.

The spelling of 13981655 in words is "thirteen million, nine hundred eighty-one thousand, six hundred fifty-five".