13381777 has 2 divisors, whose sum is σ = 13381778. Its totient is φ = 13381776.

The previous prime is 13381769. The next prime is 13381783. The reversal of 13381777 is 77718331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13278736 + 103041 = 3644^2 + 321^2 .

It is a cyclic number.

It is not a de Polignac number, because 13381777 - 2³ = 13381769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13381717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6690888 + 6690889.

It is an arithmetic number, because the mean of its divisors is an integer number (6690889).

Almost surely, 2^13381777 is an apocalyptic number.

It is an amenable number.

13381777 is a deficient number, since it is larger than the sum of its proper divisors (1).

13381777 is an equidigital number, since it uses as much as digits as its factorization.

13381777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24696, while the sum is 37.

The square root of 13381777 is about 3658.1111246106. Note that the first 4 decimals coincide. The cubic root of 13381777 is about 237.4130547858.

The spelling of 13381777 in words is "thirteen million, three hundred eighty-one thousand, seven hundred seventy-seven".