13128877 has 2 divisors, whose sum is σ = 13128878. Its totient is φ = 13128876.

The previous prime is 13128859. The next prime is 13128901. The reversal of 13128877 is 77882131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11703241 + 1425636 = 3421^2 + 1194^2 .

It is a cyclic number.

It is not a de Polignac number, because 13128877 - 2⁷ = 13128749 is a prime.

It is a super-2 number, since 2×13128877² = 344734822562258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13128827) 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, 6564438 + 6564439.

It is an arithmetic number, because the mean of its divisors is an integer number (6564439).

Almost surely, 2^13128877 is an apocalyptic number.

It is an amenable number.

13128877 is a deficient number, since it is larger than the sum of its proper divisors (1).

13128877 is an equidigital number, since it uses as much as digits as its factorization.

13128877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 37.

The square root of 13128877 is about 3623.3792238738. The cubic root of 13128877 is about 235.9079227605.

The spelling of 13128877 in words is "thirteen million, one hundred twenty-eight thousand, eight hundred seventy-seven".