128878313 has 2 divisors, whose sum is σ = 128878314. Its totient is φ = 128878312.

The previous prime is 128878301. The next prime is 128878339. The reversal of 128878313 is 313878821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128754409 + 123904 = 11347^2 + 352^2 .

It is a cyclic number.

It is not a de Polignac number, because 128878313 - 2⁴ = 128878297 is a prime.

It is not a weakly prime, because it can be changed into another prime (128878213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64439156 + 64439157.

It is an arithmetic number, because the mean of its divisors is an integer number (64439157).

Almost surely, 2^128878313 is an apocalyptic number.

It is an amenable number.

128878313 is a deficient number, since it is larger than the sum of its proper divisors (1).

128878313 is an equidigital number, since it uses as much as digits as its factorization.

128878313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 128878313 is about 11352.4584562111. The cubic root of 128878313 is about 505.1185069723.

The spelling of 128878313 in words is "one hundred twenty-eight million, eight hundred seventy-eight thousand, three hundred thirteen".