13640743 has 2 divisors, whose sum is σ = 13640744. Its totient is φ = 13640742.

The previous prime is 13640723. The next prime is 13640747. The reversal of 13640743 is 34704631.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13640743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13640747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6820371 + 6820372.

It is an arithmetic number, because the mean of its divisors is an integer number (6820372).

Almost surely, 2^13640743 is an apocalyptic number.

13640743 is a deficient number, since it is larger than the sum of its proper divisors (1).

13640743 is an equidigital number, since it uses as much as digits as its factorization.

13640743 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 13640743 is about 3693.3376504187. The cubic root of 13640743 is about 238.9347639158.

The spelling of 13640743 in words is "thirteen million, six hundred forty thousand, seven hundred forty-three".