13661759 has 2 divisors, whose sum is σ = 13661760. Its totient is φ = 13661758.

The previous prime is 13661689. The next prime is 13661773. The reversal of 13661759 is 95716631.

It is a strong prime.

It is an emirp because it is prime and its reverse (95716631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13661759 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13664759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6830879 + 6830880.

It is an arithmetic number, because the mean of its divisors is an integer number (6830880).

Almost surely, 2^13661759 is an apocalyptic number.

13661759 is a deficient number, since it is larger than the sum of its proper divisors (1).

13661759 is an equidigital number, since it uses as much as digits as its factorization.

13661759 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 38.

The square root of 13661759 is about 3696.1816784352. The cubic root of 13661759 is about 239.0574081733.

It can be divided in two parts, 1366 and 1759, that added together give a 5-th power (3125 = 5⁵).

The spelling of 13661759 in words is "thirteen million, six hundred sixty-one thousand, seven hundred fifty-nine".