13087777 has 2 divisors, whose sum is σ = 13087778. Its totient is φ = 13087776.

The previous prime is 13087771. The next prime is 13087783. The reversal of 13087777 is 77778031.

It is a balanced prime because it is at equal distance from previous prime (13087771) and next prime (13087783).

It can be written as a sum of positive squares in only one way, i.e., 13075456 + 12321 = 3616^2 + 111^2 .

It is an emirp because it is prime and its reverse (77778031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13087777 - 2⁷ = 13087649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13087771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6543888 + 6543889.

It is an arithmetic number, because the mean of its divisors is an integer number (6543889).

Almost surely, 2^13087777 is an apocalyptic number.

It is an amenable number.

13087777 is a deficient number, since it is larger than the sum of its proper divisors (1).

13087777 is an equidigital number, since it uses as much as digits as its factorization.

13087777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57624, while the sum is 40.

The square root of 13087777 is about 3617.7032769424. The cubic root of 13087777 is about 235.6614952137.

The spelling of 13087777 in words is "thirteen million, eighty-seven thousand, seven hundred seventy-seven".