13971307 has 16 divisors (see below), whose sum is σ = 16369920. Its totient is φ = 11678112.

The previous prime is 13971299. The next prime is 13971313. The reversal of 13971307 is 70317931.

It is a cyclic number.

It is not a de Polignac number, because 13971307 - 2³ = 13971299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13971317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80673 + ... + 80845.

It is an arithmetic number, because the mean of its divisors is an integer number (1023120).

Almost surely, 2^13971307 is an apocalyptic number.

13971307 is a deficient number, since it is larger than the sum of its proper divisors (2398613).

13971307 is a wasteful number, since it uses less digits than its factorization.

13971307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 13971307 is about 3737.8211567703. The cubic root of 13971307 is about 240.8494609182.

It can be divided in two parts, 1397 and 1307, that added together give a square (2704 = 52²).

The spelling of 13971307 in words is "thirteen million, nine hundred seventy-one thousand, three hundred seven".