128677013 has 2 divisors, whose sum is σ = 128677014. Its totient is φ = 128677012.

The previous prime is 128676991. The next prime is 128677037. The reversal of 128677013 is 310776821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100140049 + 28536964 = 10007^2 + 5342^2 .

It is an emirp because it is prime and its reverse (310776821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128677013 - 2¹² = 128672917 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128677093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64338506 + 64338507.

It is an arithmetic number, because the mean of its divisors is an integer number (64338507).

Almost surely, 2^128677013 is an apocalyptic number.

It is an amenable number.

128677013 is a deficient number, since it is larger than the sum of its proper divisors (1).

128677013 is an equidigital number, since it uses as much as digits as its factorization.

128677013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 128677013 is about 11343.5890704838. The cubic root of 128677013 is about 504.8553819138.

The spelling of 128677013 in words is "one hundred twenty-eight million, six hundred seventy-seven thousand, thirteen".