13700509 has 2 divisors, whose sum is σ = 13700510. Its totient is φ = 13700508.

The previous prime is 13700497. The next prime is 13700527. The reversal of 13700509 is 90500731.

13700509 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11539609 + 2160900 = 3397^2 + 1470^2 .

It is an emirp because it is prime and its reverse (90500731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13700509 - 2⁹ = 13699997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13700569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6850254 + 6850255.

It is an arithmetic number, because the mean of its divisors is an integer number (6850255).

Almost surely, 2^13700509 is an apocalyptic number.

It is an amenable number.

13700509 is a deficient number, since it is larger than the sum of its proper divisors (1).

13700509 is an equidigital number, since it uses as much as digits as its factorization.

13700509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 13700509 is about 3701.4198627013. The cubic root of 13700509 is about 239.2832143837.

The spelling of 13700509 in words is "thirteen million, seven hundred thousand, five hundred nine".