13701209 has 2 divisors, whose sum is σ = 13701210. Its totient is φ = 13701208.

The previous prime is 13701199. The next prime is 13701221. The reversal of 13701209 is 90210731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9486400 + 4214809 = 3080^2 + 2053^2 .

It is a cyclic number.

It is not a de Polignac number, because 13701209 - 2¹² = 13697113 is a prime.

It is not a weakly prime, because it can be changed into another prime (13701239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6850604 + 6850605.

It is an arithmetic number, because the mean of its divisors is an integer number (6850605).

Almost surely, 2^13701209 is an apocalyptic number.

It is an amenable number.

13701209 is a deficient number, since it is larger than the sum of its proper divisors (1).

13701209 is an equidigital number, since it uses as much as digits as its factorization.

13701209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 13701209 is about 3701.5144198017. The cubic root of 13701209 is about 239.2872895461.

The spelling of 13701209 in words is "thirteen million, seven hundred one thousand, two hundred nine".