13661773 has 2 divisors, whose sum is σ = 13661774. Its totient is φ = 13661772.

The previous prime is 13661759. The next prime is 13661783. The reversal of 13661773 is 37716631.

It is a happy number.

13661773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11847364 + 1814409 = 3442^2 + 1347^2 .

It is a cyclic number.

It is not a de Polignac number, because 13661773 - 2⁹ = 13661261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13661783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6830886 + 6830887.

It is an arithmetic number, because the mean of its divisors is an integer number (6830887).

Almost surely, 2^13661773 is an apocalyptic number.

It is an amenable number.

13661773 is a deficient number, since it is larger than the sum of its proper divisors (1).

13661773 is an equidigital number, since it uses as much as digits as its factorization.

13661773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15876, while the sum is 34.

The square root of 13661773 is about 3696.1835722810. The cubic root of 13661773 is about 239.0574898319.

The spelling of 13661773 in words is "thirteen million, six hundred sixty-one thousand, seven hundred seventy-three".