13608739 has 2 divisors, whose sum is σ = 13608740. Its totient is φ = 13608738.

The previous prime is 13608719. The next prime is 13608779. The reversal of 13608739 is 93780631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13608739 - 2⁷ = 13608611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13608698 and 13608707.

It is not a weakly prime, because it can be changed into another prime (13608719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6804369 + 6804370.

It is an arithmetic number, because the mean of its divisors is an integer number (6804370).

Almost surely, 2^13608739 is an apocalyptic number.

13608739 is a deficient number, since it is larger than the sum of its proper divisors (1).

13608739 is an equidigital number, since it uses as much as digits as its factorization.

13608739 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 13608739 is about 3689.0024396847. The cubic root of 13608739 is about 238.7477541523.

The spelling of 13608739 in words is "thirteen million, six hundred eight thousand, seven hundred thirty-nine".