13671705 has 16 divisors (see below), whose sum is σ = 22089600. Its totient is φ = 7219968.

The previous prime is 13671703. The next prime is 13671709. The reversal of 13671705 is 50717631.

13671705 = 863² + 864² + ... + 880².

It is not a de Polignac number, because 13671705 - 2¹ = 13671703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13671701) 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 15 ways as a sum of consecutive naturals, for example, 2880 + ... + 5969.

It is an arithmetic number, because the mean of its divisors is an integer number (1380600).

Almost surely, 2^13671705 is an apocalyptic number.

13671705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13671705 is a deficient number, since it is larger than the sum of its proper divisors (8417895).

13671705 is a wasteful number, since it uses less digits than its factorization.

13671705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8960.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 13671705 is about 3697.5268761701. The cubic root of 13671705 is about 239.1154067619.

The spelling of 13671705 in words is "thirteen million, six hundred seventy-one thousand, seven hundred five".