13750209 has 32 divisors (see below), whose sum is σ = 22586880. Its totient is φ = 8197200.

The previous prime is 13750201. The next prime is 13750259. The reversal of 13750209 is 90205731.

It is not a de Polignac number, because 13750209 - 2³ = 13750201 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (13750201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19554 + ... + 20244.

It is an arithmetic number, because the mean of its divisors is an integer number (705840).

Almost surely, 2^13750209 is an apocalyptic number.

It is an amenable number.

13750209 is a deficient number, since it is larger than the sum of its proper divisors (8836671).

13750209 is a wasteful number, since it uses less digits than its factorization.

13750209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 13750209 is about 3708.1274249950. The cubic root of 13750209 is about 239.5722066734.

The spelling of 13750209 in words is "thirteen million, seven hundred fifty thousand, two hundred nine".