13509983 has 2 divisors, whose sum is σ = 13509984. Its totient is φ = 13509982.

The previous prime is 13509973. The next prime is 13509989. The reversal of 13509983 is 38990531.

It is a strong prime.

It is an emirp because it is prime and its reverse (38990531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13509983 - 2⁴ = 13509967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13509989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6754991 + 6754992.

It is an arithmetic number, because the mean of its divisors is an integer number (6754992).

Almost surely, 2^13509983 is an apocalyptic number.

13509983 is a deficient number, since it is larger than the sum of its proper divisors (1).

13509983 is an equidigital number, since it uses as much as digits as its factorization.

13509983 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 13509983 is about 3675.5928773465. The cubic root of 13509983 is about 238.1688360179.

The spelling of 13509983 in words is "thirteen million, five hundred nine thousand, nine hundred eighty-three".