13643955 has 48 divisors (see below), whose sum is σ = 25867296. Its totient is φ = 6612480.

The previous prime is 13643953. The next prime is 13643963. The reversal of 13643955 is 55934631.

13643955 is a `hidden beast` number, since 1 + 3 + 643 + 9 + 5 + 5 = 666.

It is not a de Polignac number, because 13643955 - 2¹ = 13643953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13643951) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 48415 + ... + 48695.

It is an arithmetic number, because the mean of its divisors is an integer number (538902).

Almost surely, 2^13643955 is an apocalyptic number.

13643955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13643955 is a deficient number, since it is larger than the sum of its proper divisors (12223341).

13643955 is a wasteful number, since it uses less digits than its factorization.

13643955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 385 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 13643955 is about 3693.7724618606. The cubic root of 13643955 is about 238.9535165168.

The spelling of 13643955 in words is "thirteen million, six hundred forty-three thousand, nine hundred fifty-five".