13926709 has 2 divisors, whose sum is σ = 13926710. Its totient is φ = 13926708.

The previous prime is 13926697. The next prime is 13926743. The reversal of 13926709 is 90762931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11881809 + 2044900 = 3447^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 13926709 - 2⁹ = 13926197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13926779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6963354 + 6963355.

It is an arithmetic number, because the mean of its divisors is an integer number (6963355).

Almost surely, 2^13926709 is an apocalyptic number.

It is an amenable number.

13926709 is a deficient number, since it is larger than the sum of its proper divisors (1).

13926709 is an equidigital number, since it uses as much as digits as its factorization.

13926709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 13926709 is about 3731.8506133017. The cubic root of 13926709 is about 240.5929147976.

Adding to 13926709 its product of nonzero digits (20412), we get a triangular number (13947121 = T₅₂₈₁).

The spelling of 13926709 in words is "thirteen million, nine hundred twenty-six thousand, seven hundred nine".